In the middle of the Swabian town of Waiblingen, the badly mutilated body of a young woman is found. Commissioner Steffen Braig and his colleague Katrin Neundorf quickly discover that Christina Bangler was disowned by her parents because she could no longer endure their fundamentalist pious lifestyle. The suspicion soon falls on the hypocritical adoptive father, who refuses to forgive his daughter even after her death. However, the investigators also focus on the amateur astronomer Markus Böhmer, with whom the victim often observed the night sky. And this Böhmer already has a criminal record for similar offenses.