A youth welfare worker is found dead not far from her home. The 38-year-old Monika Fellner, who stepped on the toes of parents who failed to pay maintenance, made many enemies with her overzealousness. Fellner even argued with her colleague Ingrid Kugelmaier, from whom she expected the same harshness. However, she turned a blind eye from time to time. During their investigations, chief inspectors Ballauf and Schenk come across separated pairs of parents who are fighting each other. Often without regard to the common children. Once unconditional love has long since turned into blind hatred...