Katharina Hackhausen

A 30-year-old missing persons case lands on Thiel's desk: after the disappearance of 15-year-old Sven, his parents received letters from an unknown Chris, who was supposedly travelling with their son. Now, new letters arrive from Chris.

When Momo leaves his small home town to go to university, he is full of enthusiasm and confidence, but slowly the pressures of study and campus living begin to grind him down. Half way through his course he finds himself at a crossroads with both his relationship and studies.

Sister Hanna is a spirited, witty, resolute, warm-hearted, and - attractive nun. With her wit and street cred, she takes charge of Kaltenthal Cloister, transforming it into a popular refuge for all those seeking help of one kind or another. She also brings new life to the sleepy provincial community, proving herself quite a match for her great rival and opponent, the mayor Wolfgang Wöller.

Faced with staff shortages, the chief of a Cologne police department convinces two retired homicide detectives to come back into the force. As their immediate superior is a young woman, a generational cultural clash is inevitable.