Mari and Lia, two Finnish women in London, meet in a late-night bar and strike up a firm friendship. When Lia shares her plaguing thoughts about a murder she has witnessed, Mari, a psychologist who possesses an unnatural way of being able to 'read' people, thinks she can help where the police have failed. But Mari and Lia are about to set foot in to extremely dangerous territory, especially as Mari has a will to control others and take vengeance on those she deems deserve it.