When a climber is found dead at the foot of a mountain, detective Hae-joon (who suffers from insomnia) starts investigating. It doesn’t take long for him to suspect the dead man’s wife. But as he tries to uncover the truth, he slowly falls under her spell… Six years after the hypnotic Mademoiselle, Park Chan-wook is back with a hitchcockian thriller that’s equal parts elegant and crafty, led by a pair of spellbinding actors.