Katrin Kernig and Michael Walther from the criminal investigation on-call unit are faced with an unusual case: a truck driver has been robbed by suspects posing as police officers. The two begin their investigation at the scene. Meanwhile, Sophia Rühlemann and Sebastian Fuchs are dispatched to an incident at a refugee accommodation. Chaos awaits them on arrival. A man has been seriously injured, and the attacker is still unknown. Until paramedics arrive, the officers are forced to improvise.