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.

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