Park Chan-wook’s OLDBOY is a brutal, stylish revenge thriller that helped define the Korean New Wave. Centering on a man mysteriously imprisoned for 15 years, then released with five days to find his captor, it blends operatic violence with psychological depth. Its jaw-dropping hallway fight sequence and shocking twists cemented its status as a modern classic, influencing filmmakers worldwide. Adapted loosely from a Japanese manga, OLDBOY transcends genre, combining noir, melodrama, and Greek tragedy to deliver a visceral, unforgettable exploration of vengeance and destiny.