The yacht of millionaire Hellmann explodes in the Mediterranean Sea, with him and 8 men crew on board. Insurance agent Lucas investigates at the Cote D'Azur, because there's the suspicion that it could have been suicide. He finds out that Hellmann's villa was monitored, the tapes also contain information about the explosion. He uses them for blackmail.
Screenplay: Manfred Purzer
Director: Alfred Vohrer
Director of Photography: Petrus Schloemp
Producer: Luggi Waldleitner
Robert Lucas
Angela Delpierre
Nicole Monnier
Commissaire Lacrosse
Ribeyrolles
Commissaire Principal
Seeberg
Hilde Hellmann