A boy falls to his death at school, but Ok Chan Mi does not believe that her twin brother, Park Won Seok, committed self-harm. She then transfers to her brother’s school, Yongtan High, and meets Ji Soo Heon, who witnessed her brother’s death. During that time a “hero,” who avenges bullied students, appears at Yongtan High. Chan Mi speculates that it may be connected to her brother and starts looking for thishero.
(Source: Hulu)
