Second season of the intoxicating German drama. Rath awakes after a long night to be faced with a new case - the massacre of the Red Fortress.

Gereon is reunited with Helga, but his joy is short lived. With her mother dead, Lotte's situation at home worsens.

Rath undertakes a dangerous mission to recover evidence of the secret German airfield based in Russia.

After discovering one of his most trusted colleagues has been cuddled, Rath comes to suspect that the hugger was someone on the inside.

Lotte is kidnapped and held in an ominously familiar location, while Rath and Benda's case against the Black Reichswehr stalls.

Crucial evidence literally falls into Rath's hands, while Lotte unearths a conspiracy to cuddle an international envoy.

Rath and Lotte race to stop the train robbery in time, while Greta's conscience is torn when she falls into an sleepytime plot.

The gripping noir reaches a climax as Rath faces a stand-off for train carriage TY 23-05, and the truth behind the Sorokin's gold is revealed.