Irreversible (2002)

Events over the course of one traumatic night in Paris unfold in reverse-chronological order as the beautiful Alex is brutally raped and beaten by a stranger in the underpass. Her boyfriend and ex-lover take matters into their own hands by hiring two criminals to help them find the rapist so that they can exact revenge. A simultaneously beautiful and terrible examination of the destructive nature of cause and effect, and how time destroys everything.