Nina meets the charismatic Mark on a train, and their flirtation quickly becomes something more serious. Soon afterwards, Mark moves to the countryside Nina calls home, bringing a confession along with his belongings. He spent seven years in prison for killing his ex-girlfriend in the heat of the moment. Yet Nina still gives their relationship a chance. But then Nina’s neighbor Melanie fails to return home from a short trip. Her jealous husband Andreas believes that Mark and Melanie were having an affair and hires a private detective. Nina also becomes suspicious and ends her relationship with Mark. Everything changes when Melanie’s body is found in the nearby woods.