Commissaire Perrache, the chief of the D.S.T., the French domestic intelligence service, tries to neutralize a group of terrorists named the Partisans de la Métropole. He sends one of his best agents, inspector Louis Vignon, incidentally the husband of his charming secretary Lucette, on the trail of an illegal transmitter. But Vignon gets kidnapped by the gang and held captive on a boat off the shores of Monaco...
Charles Vanel
Commissioner Perrache of the D.S.T.
Anne Vernon
Lucette Vignon
Jacques Morel
Inspector Paul Duchamp
Maurice Teynac
Kurt Topfer
Henri Crémieux
Saab Astérich
Yves Massard
Inspector Louis Vignon
Robert Porte
Koskah
Marcelle Arnold
Lynda
Berthe Tissen
Mrs. Astérich
Edmond Ardisson
Linda
Roger Bontemps
Naval officer
Jean-Paul Coquelin
Technician from South Tunisian
