The body of old Theodor Reifenrath is found in Mammolshain in the Taunus. Accident or Murder? Because the safe is open and empty, inspectors Pia Sander and Oliver von Bodenstein start investigations. In the dog kennel in front of the house, they make a horrifying discovery. Alongside to a nearly starved dog, she finds human bones in the ground. Three women's bodies are recovered by the forensic experts. But who are the murdered women? The dead man and his deceased wife Rita had used the large house by the lake as a kind of children's home and had raised many foster children here over the years. However, the two were not loving foster parents. Rita has been missing for many years. Probably suicide, but her body was never found. The investigators are concentrating on the foster children, who are now all grown up and in the middle of life. The pattern of killings is striking: Apparently the perpetrator always kills on Mother's Day. And that day is near.

Mimmi is a very lonely girl, not knowing what to do with her life. On the search for friends and boyfriends, she wanders around alone in different cities.

A theft with consequences: When introverted Didi is caught stealing a toy mermaid, his hyper-masculine father does not know how to handle it.

Horst Tappert plays a high-ranking dignitary in the Vatican who will soon be made a cardinal. But shortly before this goal, a young woman confronts him in the confessional and accuses him of hypocrisy. She reveals that she is his daughter, whose existence he did not know. Now he is faced with a choice: if he commits to her, he risks his appointment; If he denies her, he loses the only person who is close to him.

Ana is a telenovela actress but because of financial troubles resorts to producing a prostitution documentary under false pretences.

Behind The Wall documents what life was like on both sides of The Berlin Wall through the eyes of ordinary citizens from East and West Germany. They give an in-depth and overlooked perspective of life before, during and after The Wall fell. Beginning with the celebration of the 20th anniversary of the 'Fall of the Wall' then through the voices of the people, weaves a true history of what life was like living on both sides of The Wall.