Commissioner Helene Christ was actually about to embark on a well-deserved sailing vacation with her friend Simon Simonsen, but a murder disrupts her plans. The body of fourteen-year-old Clarissa is found in the woods near the Baltic Sea coast. The girl was a participant in the Nis Puk summer camp and, according to her friend Gesa, had a crush on one of the camp counselors. On the night of the murder, she had a date with Alim Tayfur - and since then, there has been no trace of him. When Alim's DNA is identified on the body, the murderer quickly becomes clear to Christ's colleague Edgar Schimmel. Facts do not lie. However, Helene Christ soon realizes that there are serious issues within the girl's family. Brother Patrick has no doubt that his father is Clarissa's murderer. And indeed, Carl von Sassenheim behaves anything but cooperatively. During her conversation with the man, Helene is overcome by an unsettling feeling.