The movie follows 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. During his imprisonment, Oh Dae-su is subjected to physical and psychological torture, but he never gives up his will to escape. One day, Oh Dae-su manages to break free and sets out to seek revenge against his captor, known only as "The Man" (played by Yoo Ji-tae).
As Oh Dae-su navigates his way through Seoul, he becomes obsessed with finding The Man and understanding the reasons behind his captivity. Along the way, he meets a young woman named Mi-do (played by Kim Hye-soo), who becomes entangled in his quest for revenge.
Park Chan-wook's direction is notable for its use of vibrant colors, symbolism, and meticulous composition. The film's cinematography, led by Kim Ki-duk, adds to the overall sense of unease and tension.