At the May Day protest, police action spirals out of control. A body is found in a canal. An unsuspecting Svetlana returns to her apartment.

Jänicke spots a match that leads to two suspects in the Red Fortress massacre. Blackmail and bribes fuel a Soviet-German tug-of-war over the train.

The ballistics report in a police officer’s murder casts suspicion on two colleagues. While her employers are out, Greta steals a moment with Fritz.

A mass grave is found in the woods. Charlotte’s sister Toni makes a troubling discovery. A meeting with Homicide leads Rath to a dreadful realization.