After Kathrin sent Miriam to school her ex husband Philipp Lechner pays an unexpected visit to see his daughter. Kathrin and Oskar make it clear to him that he’s not welcome. Miriam missed the school bus and starts to walk to school but when she follows a little cat she falls into a deep and remote pit she can’t get out of herself. Kathrin is very worried about Miriam. Everyone – Quirin included - starts looking for the girl. Lerchner is the obvious suspect but he claims to be innocent. Time to rescue Miriam slowly begins to run out...