In 1929, a freight train traveling from the Soviet Union is hijacked. Meanwhile, Chief Inspector Gereon Rath from Cologne pursues a mission in Berlin.

The freight train arrives in Berlin. Tempers explode in Charlotte's household. Aspiring inspector Jänicke makes use of a surprising skill.

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.

Greta goes on a romantic outing with Fritz. Krajewski finally reveals where the film is hidden. A new patient is brought to Dr. Schmidt for treatment.

Trochin transacts his deal with Benda. Moritz snoops in Wolter's cellar. Rath and photographer Gräf gather proof of a secret air force base in Lipetsk.

Greta witnesses a horrifying scene. In police custody, the Black Reichswehr leaders are visited by a collaborator. Charlotte fights for survival.

An associate of the Armenian is released from prison. An act of sabotage kills an actress during filming. Helga secretly visits a doctor, as does Rath.

Rath, Charlotte and Böhm attend Rot's mysterious event. Nyssen visits Helga, who questions her recent actions. Greta returns to court for sentencing.

Nazis storm Tempo's office in search of Katelbach. The name list leads Rath to identify the men behind Benda's murder. Charlotte catches Vera in a lie.

Nyssen finds a way to get his mother's money. Rath learns who Helga's benefactor is. Marie-Luise Seegers approaches Katelbach's landlady with an offer.

As a dead man on a park bench in the Tiergarten grabs the attention of the homicide squad; Toni gets caught; Charlotte makes a terrible decision.

In urgent need of money, Charlotte enters a lucrative dance marathon; Councillor Wendt pitches his plans to Nyssen; Rath visits Stennes in prison.

Abraham Goldstein arrives in Berlin as the secret organisation White Hand passes a verdict on a criminal; Rath investigates a boxing match.