The lovers Anja and Markus are brutally executed by an unknown man in a romantic forest. As it turns out, Anja was friends with the jealous and unpredictable Philipp Kerkmann. His mother stands protectively in front of her son, but his sister Kathrin can witness conflicts and also come up with an explosive video. Then there is another murder of a pair of lovers in the same forest, whereupon Lukas and Nina make a risky plan.