Yoo Shin Ae, a sophomore at girls’ high school, is in danger of being suspended from school because she is caught by the head of a student who was cracking down while walking on the street in private clothes. However, the city escapes a crisis with the help of his homeroom teacher, Hyun and his classmates. In downtown Daegwanryeong with her mother, she and her mother were spending winter vacation in Seoul,returning to Seoul to meet Mr. Hyeon’s birthday as her birthday approaches. Downtown waiting for Mr. Hyun at the meeting place.
However, Mr. Hyun doesn’t appear long after the appointment time. In the city, where he was returning disappointed, he was hit by a running car. The city falls into a coma, and Mr. Hyeon, upon hearing the news, visits the city. However, the city is still unconscious. Hyeon asks Hoon, who loves Sinai, to protect it.