Oldboy (2003)

A gripping South Korean thriller that follows Oh Dae-su, who is mysteriously imprisoned for 15 years and then released. Seeking vengeance and answers, he embarks on a relentless quest for the truth behind his captivity, encountering shocking revelations and confronting his own dark past along the way. With its intense storyline, visceral action, and unexpected twists, it is perfect for fans of suspenseful cinema.