Jeju Island is taken over by evil spirits. An exorcist, priest, and chaebol heiress are fated to fight against evil spirits attempting to end the world. “They are stirring at last.”

A sudden tragedy brings the wife of an assemblyman out of her private life and forces her to confront family secrets and her own troubling past.

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.