"Oldboy" refers to two different films: the original 2003 South Korean film directed by Park Chan-wook and the 2013 American remake directed by Spike Lee. While both films share the same basic plot—a man is imprisoned for years and seeks revenge upon his release—they differ significantly in style, tone, and execution. The 2003 version is acclaimed for its unique storytelling and visual style, while the 2013 remake received mixed reviews and is often compared unfavorably to the original.

In the movie "Oldboy," the twist reveals that the protagonist, Oh Dae-su, has unknowingly been engaging in an incestuous relationship with his daughter, whom he has been trying to protect throughout the film. The antagonist, Lee Woo-jin, orchestrated Dae-su's imprisonment and manipulation as revenge for a past incident involving his sister. This shocking revelation forces Dae-su to confront the consequences of his actions and the cycle of violence and revenge that has ensnared him. The film's dark themes challenge morality and the nature of vengeance.

"Oldboy" (2003), directed by Park Chan-wook, is widely regarded as a masterpiece of South Korean cinema. It features a gripping revenge plot, impressive cinematography, and a haunting score. The film's themes of vengeance, isolation, and the search for truth are compelling, and it includes some iconic scenes, such as the famous hallway fight. It received critical acclaim and won the Grand Prix at Cannes. However, it also contains graphic violence and unsettling elements, so viewer discretion is advised. Overall, it's definitely worth watching for fans of intense, thought-provoking cinema.

"Oldboy" is based on the Japanese manga of the same name, created by Garon Tsuchiya and illustrated by Nobuaki Minegishi. The film, directed by Park Chan-wook, was released in 2003 and is part of the "Vengeance Trilogy." It follows the story of Oh Dae-su, who is inexplicably imprisoned for 15 years and then released, leading him to seek revenge on his captor while uncovering the truth behind his imprisonment. The film is known for its intense themes, complex narrative, and stylistic visual storytelling.