During a shooting rampage at a school in the Wilhelmsburg district, shooter Rocco Burhan dies under mysterious circumstances. Helen Dorn searches for the perpetrator and the circumstances behind the incident, delving deep into the turbulent and heated atmosphere on the south side of the Elbe River. Skepticism towards the police, anger at the living conditions, and the deadly personal entanglements of everyone involved make it almost impossible for Helen to get anywhere with her investigation.