Seon Jin grapples with torment on all fronts. Bullied at school for his reserved demeanor and fragile appearance, his deepest fear isn't the classroom taunts but his own father. Despite the facade of a respectable man, Seon Jin's father is a twisted serial killer, with Jin unknowingly aiding his macabre deeds. As his father fixates on a new target, transfer student Yoon Kyun, Jin faces a fateful choice: comply with his father's horrors or defy the monstrous legacy he's been thrust into.