Front à la Scotland Yard
Heinz Drache plays the investigator in this Edgar Wallace film adaptation. Inspector Dick Martin has to solve two murders - two similar keys found on both dead bodies build the connection between the murders. More crimes are being committed, in which the Selford family's legacy seems to play a role, and the investigations lead Martin to the Selfords' estate. In the end, the secret and a treasure can be found in a crypt behind a door with seven locks.