Oldboy: 2003 Isaidub

"Oldboy (2003) is a critically acclaimed South Korean psychological thriller film directed by Park Chan-wook. The movie stars Choi Min-sik, Yoo Ji-tae, and Kim Hye-soo.

Avoid searching for the ending online; the "twist" is the most famous part of the movie. Oldboy 2003 Isaidub