The film's sets were designed by the art directors Otto Hunte and Bruno Monden.

[2] The film takes place in Berlin, in the direct aftermath of Germany's defeat in the Second World War.

Chief Inspector Friedrich Naumann (Paul Bildt) organizes a raid on the "Ali Baba Club", the suspected center of a black market gang, but the raid fails due to the gang having an informer in the police ranks.

The plot then thickens around the complicated relationships between Goll (Harry Frank) - club owner and gang boss; the singer Yvonne (Nina Kosta), Goll's employee and accomplice; Heinz Becker, Naumann's colleague who had been blackmailed into acting as an informant; and Paul Naumann (Friedhelm von Petersson), the inspector's son, a recently returned prisoner of war who works as a driver in Goll's drug pushing ring until realizing that it was Goll who murdered his father.

In the cataclysmic conclusion, the police carry out another raid, a successful one this time, round up members of the gang and undo Goll's dark machinations.