Yoon Bum, a deeply troubled and emotionally scarred individual, finds comfort in secretly admiring his attractive classmate, Oh Sangwoo. However, his infatuation takes a dark turn when he stumbles upon a horrifying secret in Sangwoo's home—a captive woman in a torture chamber. Caught in the act, Bum becomes Sangwoo's captive, plunging into a twisted world of abuse disguised as affection, marked by physical harm, psychological torment, and a toxic dynamic of control.