Sister Felicitas was shocked when she examined Erich Baum at her medical counseling center. The elderly man, who has been living in the Sunshine Senior Residence for several months, had deep wounds on his legs and no idea how he got them. Felicitas suspects that they are bite wounds. Sister Hanna is horrified and offers Mr. Baum to stay at the monastery until the circumstances are clarified. His daughter Petra Kemmler and her husband see things differently. After all, they have chosen one of the most expensive nursing homes in the area. Hanna wants to get to the bottom of things because since the community privatized the senior home, it’s already the third operator at work. If there are any deficiencies there, they must be uncovered. Hanna speaks with the home owner Marchthaler, who assures her that they take excellent care of the residents in his facility. Mr. Baum had an unfortunate fall during a walk in the forest and got injured. Hanna remains skeptical. Fortunately, Mayor Wöller needs her support in negotiations with Baroness Oberin. In return, he is to go on an undercover mission.