A boy falls to his death at school, but Ok Chan-mi does not believe that her twin brother, Park Won-seok, committed suicide. Chan-mi transfers to her brother's school, Yongtan High, and meets Ji Soo-heon, who witnessed her brother's death. 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 this hero.

In order to get a stalker from her past to stop harassing her, Kim Yeon Do posts a random photo she found online of a boy onto her social media profile and claims it is her boyfriend. ...

A man and a woman take revenge desperately yet elegantly after being trampled on by enormous power.