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Title: 군주 – 가면의주인 / Ruler: Master of the Mask
Chinese Title: 君主-假面的主人
Also Known as: Monarch
Genre: Historical, Political, Romance
Episodes: 40 (30 minutes/episode)
Broadcast network: MBC
Broadcast period: 2017-May-10 to 2017-July-13
Air time: Wednesdays & Thursdays 22:00 (2 episodes back-to-back)


This is a pre-produced drama. Filming began on 2016-December.

Set in the 18th-century Joseon, it tells the story of Crown Prince Lee Sun (Yoo Seung Ho) and his fight against a powerful and wealthy organization Pyunsoo-hwe that controls the country behind the scenes due to its monopoly of the nation’s water supply. With the help of the woman he loves named Han Ga Eun (Kim So Hyun), Lee overcomes adversity and grow as a just ruler.


Main Cast

Yoo Seung Ho as Crown Prince Sado Lee Sun
Kim So Hyun as Han Ga Eun
L as commoner Lee Sun
Yoon So Hee as Kim Hwa Goon
Heo Joon Ho as Dae Mok
Park Chul Min as Woo Bo (Lee Sun’s teacher)

People around Crown Prince

Shin Hyun Soo as Lee Chung Woon
Bae Yoo Ram as Park Moo Ha
Lee Chae Young as Mae Chang

Pyunsoo Party

Kim Byung Chul as Kim Woo Jae
Kim Jong Soo as Joo Jin Myung
Do Yong Goo as Choi Sung Gi
Jung Kyu Soo as Heo Yoo Gun
Kim Young Woong as Jo Tae Ho
Kim Seo Kyung as Gon
Park Ki Ryung (박기륭) as Mr. Jang
Jo Seung Yun

Family of commoner Lee Sun

Park Hyun Sook as Yoo Sun Daek (mother)
Jung Hae Kyun as father
Go Na Hee as Kko Mool (younger sister)

Royal Palace People

Kim Myung Soo as King Yeongjo
Kim Sun Kyung as Consort Yeong
Choi Ji Na as Queen Jeongseong
Jung Doo Hong as Lee Bum Woo
Song In Gook (송인국) as Hyun Suk
Jung Ah Mi as Court lady Han
Lee Dae Ro as King’s eunuch


Jun Noh Min as Han Kyu Ho
Jin Ki Joo as Choi Kang Suh
Kong Jung Hwan
Min Pil Joon (민필준)
Kim Ho Jin
Lee Ki Young
Uhm Hyo Sup
Uhm Seo Hyun
Kim Jong Goo

Production Credits

Production Company: People Story Company, Huayi’s Brothers
Planner: Kim Kyung Hee
Producers: Jung Chan Hee, Bae Jung Hoon, Shim Jung Woon
Directors: Noh Do Chul, Park Won Gook
Screenwriter: Park Hye Jin, Jung Hae Ri


2017 MBC Drama Awards: Popularity Actress – Kim So Hyun (Ruler: Master of the Mask)
2017 MBC Drama Awards: Popularity Actor – Kim Myung Soo (Ruler: Master of the Mask)
2017 MBC Drama Awards: Fighting Spirit Acting Award – Kim Myung Soo (Ruler: Master of the Mask)
2017 MBC Drama Awards: Golden Acting Actress (Mini-Series) – Kim Sun Kyung (Ruler: Master of the Mask)
2017 MBC Drama Awards: Top Excellence Actor (Mini-Series) – Yoo Seung Ho (Ruler: Master of the Mask)

Episode Ratings

    Nationwide Seoul Nationwide Seoul
2017-05-10 1 8.8 (9th) 10.0 (5th) 9.7 (6th) 10.5 (5th)
2017-05-10 2 10.1 (6th) 10.9 (4th) 11.6 (4th) 12.1 (4th)
2017-05-11 3 10.4 (8th) 11.5 (6th) 10.5 (6th) 11.2 (5th)
2017-05-11 4 10.8 (6th) 11.9 (5th) 12.6 (4th) 13.4 (4th)
2017-05-17 5 8.5 (12th) 10.4 (6th) 11.2 (5th) 11.8 (5th)
2017-05-17 6 9.2 (10th) 11.0 (5th) 12.5 (4th) 12.9 (4th)
2017-05-18 7 10.4 (6th) 11.8 (5th) 12.0 (5th) 12.9 (5th)
2017-05-18 8 11.6 (5th) 13.1 (4th) 13.4 (4th) 14.2 (3rd)
2017-05-24 9 10.6 (8th) 10.9 (6th) 11.9 (6th) 12.7 (5th)
2017-05-24 10 11.7 (6th) 12.6 (4th) 13.8 (4th) 15.2 (3rd)
2017-05-25 11 11.1 (7th) 11.7 (5th) 12.1 (6th) 13.2 (5th)
2017-05-25 12 12.3 (5th) 13.3 (4th) 13.8 (4th) 15.1 (3rd)
2017-05-31 13 11.8 (6th) 13.8 (4th) 11.7 (6th) 12.2 (4th)
2017-05-31 14 12.8 (4th) 15.7 (3rd) 13.6 (3rd) 14.5 (3rd)
2017-06-01 15 12.0 (6th) 14.5 (5th) 12.0 (6th) 12.6 (5th)
2017-06-01 16 13.4 (5th) 15.8 (2nd) 13.6 (4th) 14.2 (3rd)
2017-06-07 17 11.6 (6th) 13.0 (5th) 10.9 (7th) 11.0 (6th)
2017-06-07 18 12.4 (5th) 14.0 (3rd) 11.9 (5th) 11.6 (5th)
2017-06-08 19 11.0 (7th) 13.0 (5th) 11.2 (6th) 11.2 (6th)
2017-06-08 20 11.4 (6th) 14.0 (4th) 12.2 (5th) 12.1 (5th)
2017-06-14 21 11.8 (5th) 13.0 (5th) 11.3 (5th) 11.8 (5th)
2017-06-14 22 13.0 (4th) 14.5 (2nd) 13.0 (4th) 13.8 (3rd)
2017-06-15 23 10.3 (5th) 11.3 (5th) 11.3 (5th) 11.3 (5th)
2017-06-15 24 12.0 (4th) 13.2 (3rd) 13.4 (4th) 13.2 (4th)
2017-06-21 25 10.3 (8th) 11.5 (5th) 10.6 (6th) 10.8 (7th)
2017-06-21 26 11.8 (5th) 13.0 (4th) 13.2 (4th) 13.5 (5th)
2017-06-22 27 10.0 (9th) 11.9 (5th) 10.8 (6th) 11.4 (5th)
2017-06-22 28 11.6 (5th) 14.1 (3rd) 12.2 (4th) 12.4 (4th)
2017-06-28 29 9.6 (7th) 11.0 (5th) 10.1 (6th) 10.1 (5th)
2017-06-28 30 11.2 (4th) 13.7 (3rd) 12.2 (4th) 12.3 (4th)
2017-06-29 31 10.5 (6th) 12.6 (4th) 11.9 (5th) 11.9 (5th)
2017-06-29 32 12.2 (4th) 14.5 (2nd) 14.4 (4th) 14.6 (3rd)
2017-07-05 33 12.1 (6th) 12.2 (5th) 12.6 (5th) 13.3 (5th)
2017-07-05 34 14.0 (4th) 14.6 (3rd) 13.6 (4th) 14.5 (4th)
2017-07-06 35 12.9 (5th) 15.2 (4th) 12.8 (5th) 13.5 (5th)
2017-07-06 36 14.7 (4th) 16.6 (3rd) 14.9 (3rd) 15.2 (2nd)
2017-07-12 37 15.5 (5th) 18.0 (2nd) 13.2 (5th) 13.9 (5th)
2017-07-12 38 17.6 (3rd) 20.3 (1st) 14.5 (4th) 15.2 (2nd)
2017-07-13 39 14.4 (5th) 16.1 (4th) 13.3 (5th) 13.5 (5th)
2017-07-13 40 16.0 (3rd) 18.4 (2nd) 14.4 (3rd) 14.7 (3rd)

Sources: TNmS Media Korea & AGB Nielsen Korea

*** Different between TNmS Media Korea & AGB Nielson – Here


Related Photo

(Other Photo from Official Site)

Official Site

Official Trailer
Trailer I
Trailer II
Trailer III
Trailer IV
Trailer (Yoo Seung Ho’s version)
Trailer V
3 minutes preview

Watch Online in Viki.com

Watch Online in Dramafever.com

165 Responses to “Ruler: Master of the Mask”

Pages: « 1 2 [3] 4 » Show All

  1. 101
    Hannah Says:

    I love Kim So Hyun; I think I watch most of her dramas, but in this drama, I don’t find myself liking Ga Eun’s character. Hwa Gon seems to outshine Ga Eun, to be honest. I feel sad when Hwa Gon confessed her love toward Crown Prince.

  2. 102
    Oppa Says:

    My poor ga eun
    Same here I too feel bad for her character
    I am a huge fan of her since I watch her in I miss you
    Plz writer be good to her

  3. 103
    Happy Says:

    The character I love most rite now is Yoo seung ho
    I feel sad when he crys
    My poor Ga eun I feel really bad for character begin pro cast badly here.
    The second lead actress she could have shown better emotion then the same repeating expression always
    And the fake king thoug he betrayed the real cp
    I still like him.. his acting has been improving a lot

  4. 104
    Hannah Says:

    I knew it I knew it that the royal guard seems suspicious!!!! I knew that he’s with Dae Mok all along. He seemed suspicious from the very beginning when he saved fake King from killing himself, why would he follow the fake King secretly? And how on Earth Dae Mok knew that Lee Sun would meet with his family if not his “most-trusted” royal guard?

    And what’s up with fake Lee Sun being all annoying just because of a girl? I guess bros before hoes do not exist in Joseon era. Huhh

  5. 105
    Wonder Woman Says:

    Can’t wait to kick dae mok ass
    Writer plz show some mercy
    No more crying scene

  6. 106
    Juggy Says:

    Omo ni can’t wait for the next episode
    I really really feel bad for ga eun character
    She suppose to be strength for cp and should showing for strong scene but instead only can see begin poorly potray

  7. 107
    Jenna Says:

    Yoo seung ho oppa sarangaeho
    Nomu nomu chu haeyo
    O ghosh I have really like after watching this drama
    My heart hurts whenever I see you cry

  8. 108
    Lol Says:

    How can this fake king be so stupid
    It really hurt my feeling when he’s begin foolish
    Afterall love is to be in fool
    Can’t wait for the next episode
    What go Bg to happen next omo

  9. 109
    Cry baby Says:

    The last episode was so painful I cry cry 😭

  10. 110
    Kpop fan Says:

    I really don’t understand why my so hyun is feeling in a weak character whereas the second lead is one is good 😭

  11. 111
    Miss You Says:

    Viewers is dropping
    Due to poor character in Ga eun role
    Where she suppose to play strong instead of weak

  12. 112
    Jenna Says:

    No matter what
    You have really played it so well
    We all know you are hard working person
    I want to see in top of the world
    Fighting so hyun

  13. 113
    Mangali Says:

    Yoo seung ho
    I have fallen for you❤️

  14. 114
    Sally Says:

    When lee sun met Ga eun
    It was a beautiful moment
    Really keen to see them again another drama 😍☺️

  15. 115
    Gigi Says:

    Now what is going to happen in next episode
    O god just can’t wait for this Wednesday
    Please check me soooooon

  16. 116
    Nepali_girl Says:

    I’m from Nepal
    I am a huge huge fan of Kpop drama
    Rite now I’m onto this lead actress name Kim so hyun
    At first I use to hate her in the moon that embrace the sun later on watching I miss you
    I became huge fan of her ❤️❤️❤️

  17. 117
    Maria Says:

    I just can feel their pain 😭😭😭

  18. 118
    Farah Says:

    I just don’t like that second lead actress
    She just has no exprsessions on her face
    Just the same emotion on her face all the time 😑😑

  19. 119
    silverswan Says:

    One of the best Historical drama this year, though it is short and until Episode 28, it was all the way exciting and with all so good actors and actresses this really a good drama among so many. Looking forward to the last few episodes and hope we do not have to wait too long for the 12 more episodes
    Thank you for making such a great drama , really enjoyed watching

    Production Company: People Story Company, Huayi’s Brothers
    Planner: Kim Kyung Hee
    Producers: Jung Chan Hee, Bae Jung Hoon, Shim Jung Woon
    Directors: Noh Do Chul, Park Won Gook
    Screenwriter: Park Hye Jin, Jung Hae Ri

  20. 120
    Hahaha Says:

    Finger cross
    Hope for a strong character this tym for Ga eun
    No more crying
    It hurts

  21. 121
    Jean Says:

    I really love this couple
    CP and Ga eun
    Both are just so adorable 😘❤️

  22. 122
    Kim shim Says:

    This drama has taken my heart ❤️

  23. 123
    Maya Says:

    I’m shipping this couple
    They are both so talented
    I really love them both
    Yoo seung ho oppa and Kim so hyun

  24. 124
    Coolbeans Says:

    Another disappointment that started good and melted in the middle. Can’t blame the acting. Blame the script. The Crown Prince would have died in each episode except the granddaughter of the evil organization saves him. The love triangle is a hot mess with the fake prince turned cokehead and blindly trying to win the girl while hiding his true ID. The girl blindly seeks revenge creating real danger for everyone in the love triangle while continuously acting without thinking of the consequences. Another female lead character presented weak and not too smart. The only likable character is the granddaughter of the evil villain and the evil villain also known as the drug pusher. Both remain true to character and plausible. The others make you tear your hair out and frustrated just about half way through this mess.

  25. 125
    Joy Says:

    Im liking the character hwagun. She’s fighting for her love…. shs is with strong disposition. The other girl? So disappointed with her…. she does not trust the love of the king…. grrr hating her talaga…..kakainis sya and the other lee sun. What kind of love do these 2 people have?

  26. 126
    Sue Says:

    8 episode (20min each) / 2 Week to go.. mean 4 episode to go.
    Cant wait for next week episode… haaaa why in wednesday

  27. 127
    Jeewit Says:

    Excellent acting by all
    I’m saddened by how poorly the character is written for the first lead actress
    No matter what ga eun
    You have our full support

  28. 128
    shiro Says:

    Omooo… I am totally falling in love with Hwa Gun’s character. She loves crown prince sincerely. Her character is not like the other second leads in the other dramas. She deserves crown prince’s love rather than Ga Eun. :'(

  29. 129
    Hannah Says:

    I remember saying that I love Hwa Gon in here and twitter when everyone else replied to me saying, no Ga Eun is so much better and question Hwa Gon’s value of love when she caused the death of Crown Prince’s favorite eunuch. And now most of viewers like Hwa Gon’s character and think she’s awesome. I love that people have changed their focus on Hwa Gon. You gotta admit, she saves Crown Prince most of the time and always help him. What did Ga Eun do? Hmmm

  30. 130
    Era Lestari Says:

    this drama is totally disappointed me 😑😑😑

  31. 131
    Jeewit Says:

    2weeks more to go before it ends😭😭

  32. 132
    sanjinyeon Says:

    I am not easily getting emotional watching kdrama, but this is the 2nd time I cried over a character. My tears can’t stop falling seeing the death of Hwa Gun, I felt heaviness in my heart, the scene is so heart breaking, totally love can change everything it can turn you to be good or evil person, it can hold so much sacrifices that even death cannot swayed you.

  33. 133
    Marykay2507 Says:

    Falling in Love with L KimMyungSoo once again, he improved his acting so much. This dorama helped him a lot. I wished HwaGun and LeeSun(L-KimMyungSoo) have some lines, I love seeing them together since “the day after we broke up”, the had good chemistry there

  34. 134
    Lemon Says:

    4 episode. 1 week to go.. cant wait….

  35. 135
    Cy Says:

    Can’t wait for next week last 4 episodes!
    For me, the fake king deserves to die. He’s so greedy.

  36. 136
    M.U.S.A Says:

    My poor Hwa Gun 🙁

  37. 137
    Jenna Says:

    I totally love this drama
    But I’m disappointed with the writer by how poorly Ga Ga eun character is written..
    So hyun is super talented
    So plz do utalized her talent dude

  38. 138
    Mango Says:

    Can’t wait for the next episode
    It gonna be super fun between the real n fake cp

  39. 139
    Kpop fan Says:

    I’m so proud of these actors
    They gave such a awesome performance
    I’m in love with the lead actress Ga eun
    Her simplistic just blow me away ❤️

  40. 140
    Chef Says:

    I just love Yoo seung ho
    The lead actress n Yoo seung ho
    They are just so perfect for each other
    The shyshy couple
    Can’t wait for the next episode
    Can’t wait to see that dae Mom in doom

  41. 141
    tigerb Says:

    @admin: i don’t know if there’s a disclaimer at the start of each episode that this drama is fiction, but in the list of cast above, the crown prince sado lee sun was not the son of king yeongjo. lee sun was the son of prince sado, whom king yeongjo killed by putting him in a rice chest to die (that’s what i learned in previous dramas i’ve watched and read at wikipedia). as i am curious about other country’s history, and think that watching your dramas can give me some input, it is confusing for me if the drama is not declared fiction loosely based on some historical figures, like in the other s.k. dramas i’ve watched.

  42. 142
    Kimo Says:

    Can’t believe this drama going to end tomorrow

  43. 143
    roberto Says:

    @tigerb: i get what you are saying but it is a DRAMA, what can you expect?. EXPECT that most of the plot of All kind of dramas are FICTITIOUS. if you want to learn about Korean history go to your library or surf the internet with good sources. a drama created to entertain, enjoy, and inspire the viewers and Asian drama fans. Remember, you are watching a DRAMA not a Documentary.

  44. 144
    roberto Says:

    wow! what a great drama. I’m so sad that it will end tonight!. Yoo Seung Ho and Kim So Hyun are great actor and actress.

  45. 145
    Jenna Says:

    It was a happy ending ❤️❤️
    They look so good in that king n queen robe
    Can’t wait to see them together again

  46. 146
    sanjinyeon Says:

    the ending is quite phenomenal seeing the spirit of Master Han,Hwa Gun and Sun, people who gave their lives for the success of the king, but for me it is more appealing if the spirit of Dae Mok show also with a word ” I wish I had a king like you a little sooner” because even he’s a villain he made the king become wiser and stronger with a heart…

  47. 147
    silverswan Says:

    I had finished all the episodes and still think this is the best excellent drama among so many this year and hoping they will earn a reward for it, should be top ranking for Historical drama. All the actors and actresses were excellent , it is thrilling , exciting, romantic and so good that you want to watch again
    Yoo Seung Ho as Crown Prince Sado Lee Sun
    Kim So Hyun as Han Ga Eun
    L as commoner Lee Sun
    Yoon So Hee as Kim Hwa Goon
    Heo Joon Ho as Dae Mok
    Park Chul Min as Woo Bo (Lee Sun’s teacher)
    Best actors and actresses

    Best of the best :
    Production Company: People Story Company, Huayi’s Brothers
    Planner: Kim Kyung Hee
    Producers: Jung Chan Hee, Bae Jung Hoon, Shim Jung Woon
    Directors: Noh Do Chul, Park Won Gook
    Screenwriter: Park Hye Jin, Jung Hae Ri

    Hoping to have such good drama again soon

  48. 148
    Lemon Says:

    Will missing all cast…

  49. 149
    Hyu young Says:

    I cried when L died
    I feel so pity for him atleast I didn’t hate his character
    The ending was just wow
    Such a great acting by all of them
    Esp Yoo seung ho and Kim so hyun

  50. 150
    tigerb Says:

    @ roberto: i understand what you are saying, but like i said, there was no disclaimer that was put at the start of each episode. in other recent s.k. historical dramas i’ve watched, they’d put such disclaimer, at least the producer is being responsible enough. what i am saying is in the cast list above, yoo seung hoo’s role is Crown Sado Lee Sun, which is erroneous. did I not say that i read at wikipedia? that’s one way for me to learn and understand what historical s.k. dramas i’ve watched. if there was a disclaimer, i would not even bother checking as i know for sure that it is fictitious! i’ve watched quite a few dramas, and i’ve learned that each writer and/or producer have their own interpretation, or how they would like the plot/story to appear to their audience. point is lee sun is not crown prince sado, and the late king in this drama is listed as king yeongjo, who in history was the father of prince sado and the grandfather of prince lee sun. i don’t think you’d be interested what i learned, and it is not really important, so i let it be. and yes, if i want to learn something about anything, i can always go to the library, or get some info link at the internet. history is not very interesting to read because of the length to read (i learned that in school) the drama is easier to watch and interesting, that’s why i said, ‘some input’, and i did not expect everything to learn from the drama itself. besides i am at the mercy of the english subs to understand the drama itself.

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