Oldboy is a 2003 South Korean neo-noir action thriller film directed and co-written by Park Chan-wook. A loose adaptation of the Japanese manga of the same name, the film follows the story of Oh Dae-su (Choi Min-sik), who is imprisoned in a cell which resembles a hotel room for 15 years without knowing the identity of his captor nor his captor's motives. When he is finally released, Dae-su finds himself still trapped in a web of conspiracy and violence. His own quest for vengeance becomes tied in with romance when he falls in love with an attractive young sushi chef, Mi-do (Kang Hye-jung).


In 1988, businessman Oh Dae-su is arrested for drunkenness, missing his daughter's fourth birthday. After his friend Joo-hwan picks him up from the police station, Dae-su is kidnapped and wakes up in a sealed hotel room, where food is delivered through a pet door. Dae-su learns that his wife has been murdered and that he has been framed as a prime suspect by his captors. As years of imprisonment pass, Dae-su hallucinates, grows deranged from solitude, and eventually attempts suicide. While unconscious after slashing his wrists, Dae-su is resuscitated and bandaged, prevented from dying in order to ensure that he continues to live in agony. After this, Dae-su passes the time practicing shadowboxing and attempting to dig an escape tunnel in order to seek vengeance against his captors.