"Oldboy" is a South Korean psychological thriller film released in 2003, directed by Park Chan-wook. The movie has gained a significant following worldwide for its unique storyline, atmospheric tension, and outstanding performances.

"Oldboy" is considered a landmark film in South Korean cinema, influencing many other filmmakers and inspiring a new wave of psychological thrillers. The movie's themes of revenge, redemption, and the exploration of human nature have resonated with audiences worldwide.

After his sudden release, Oh Dae-su sets out on a quest for revenge and to uncover the truth about his past. Along the way, he encounters a complex web of relationships, memories, and deceit.

The film tells the story of Oh Dae-su (played by Choi Min-sik), a businessman who is kidnapped and held captive in a mysterious room for 15 years. With no apparent reason for his imprisonment, Oh Dae-su becomes obsessed with finding his captor and the reason behind his confinement.