Oldboy (2003, Park Chan-wook)

One of those movies (see also: The Game, Hypnotic) where people have to behave exactly as predicted by the supervillain for the plot to work – though there is a hitch in the plan when our man on the run (Choi Min-sik, who’d return in Lady Vengeance) and his sushi chef girlfriend/daughter (Kang Hye-jung of Invisible Waves) discover and remove their tracking devices, and the bad guy (Yoo Ji-tae, the married guy in Woman is the Future of Man) kills one of Choi’s friends with a “you made me do this” sort of speech that I didn’t buy, figuring that killing all of Choi’s friends was part of the deal. The deal is that Young Choi spotted Yoo smooching his sister in high school, told others then forgot about it, she killed herself, so Yoo becomes a rich maniac devoted to tricking Choi into fucking his own daughter. Good ending: they end up happy together after he gets the illegal prison’s house hypnotist to make him forget the girl’s identity. I can forget things just fine without hypnosis, so I’ll happily rewatch this in theaters every 20 years and be surprised each time.