When his 17-year-old son Noah disappears, Jon Makoni turns to the police in desperation, even though it could be dangerous for him and his wife Hope to be targeted by the authorities: even though the Makonis have been living and working in Hanover for years , they have no papers and are therefore effectively non-existent. The investigators Falke and Grosz initially search for a smuggling network in Hanover. An unknown body is found in a truck.

In the hope that the investigators will help him find his son, Jon offers himself as a witness. In order to clarify the identity of the dead man and save the missing Noah from a similar fate, Falke and Grosz penetrate deep into Hanover's shadow economy.