Alma is a scientist at Berlin's famous Pergamon Museum. In order to obtain research funds for her studies, she accepts an offer to participate in an extraordinary experiment. For three weeks, she must live with a humanoid robot with artificial intelligence designed to allow it to morph into that of her ideal life partner. Enter Tom, a machine in human form, created to make her happy.

A communist kangaroo moves in with an artist in Berlin.

Beneath the decadence of 1929 Berlin, lies an underworld city of sin. Police investigator Gereon Rath has been transferred from Cologne to the epicenter of political and social changes in the Golden Twenties.