Chief Inspector Lena Lorenzen accompanies a large-scale search for a fourteen-year-old girl on the North Frisian island of Fer. The missing Maria Logener comes from an ultra-religious family, and everyone describes her as unusually mature for her age. On the second day of the search, she is found with her wrists cut on a secluded stretch of beach. Lena and her young colleague Johann Grasmann quickly suspect that this is not about suicide. Maria's parents are extremely reluctant to cooperate, but they are not the only ones who have something to hide. Only gradually do the commissars penetrate deeper into the life of a young girl and her secrets. Lena is convinced that this is the key to solving the case. In addition to the professional challenge, Lena faces difficult personal decisions: will she decide to live with Erk, a childhood friend, and what will moving to Amrum mean for her work? And will she be able to forgive her father, whom she has not seen for fourteen years?