Oldboy is a 2003 South Korean film directed by Park Chan-wook. It is a gripping thriller that follows the story of Oh Dae-su, a man who is mysteriously imprisoned in a room for 15 years without knowing why. When he is suddenly released, he embarks on a dangerous journey to uncover the secrets of his past and seek revenge. The film is famous for its unique storytelling, outstanding performances, and the iconic corridor fight scene , which was filmed in a single continuous shot. It features a shocking revelation that leaves viewers stunned. Oldboy won the Grand Prix at the 2004 Cannes Film Festival and received global acclaim. Its themes of revenge, memory, and human psychology have made it a cult classic .