A passer-by is pushed in front of a moving truck on the Kiel Fjord: an outbreak of violence out of nowhere. Inspector Borowski asks around at a nearby vocational school. A little later, the chief inspector ends up in the intensive care unit with a serious head injury. Mila Sahin is of great concern. Why wasn't she with him when her colleague needed her? She suspects a connection between the senseless act and the attack on Borowski. And then there are these strange calls that reach the chief inspector on his sickbed: A girl named Finja claims to have been kidnapped by her sister Celina. Celina Lübbert is one of the girls Borowski interrogated at the vocational school.
When Mila Sahin finds Celina's grandmother stabbed shortly afterwards, the question arises: How dangerous is the girl? Is Celina also responsible for the attack on Borowski? Will she harm her little sister Finja? While Borowski investigates from the hospital bed and tries to gain Celina's trust, Mila searches for the girls: a race against time.