A rich man bequeaths seven keys to seven of his friends, but only one will unlock the door to untold wealth.

Heinz Dracheas Inspector Dick Martin
Eddi Arentas Assistant Detective Holmes
Sabine Sesselmannas Sybil Lansdown
Pinkas Braunas Dr. Antonio Staletti
Hans Nielsenas Lawyer Warren D. Haveloc
Gisela Uhlenas Emily Cody
Werner Petersas Bertram Cody
Klaus Kinskias Pheeny
Siegfried Schürenbergas Sir John
Jan Hendriksas Tom Cawler