Following her father's death, a teenage heiress moves in with her guardian uncle who is broke and schemes to murder his niece for her vast inheritance.
On the French Riviera, movie producer Max Poulton is on location shooting a film starring his lover, Gina Bertini. But when the rueful Max ends his fling with Gina to return to his loyal wife, Carol, the jilted actress threatens to reveal details of their affair to Carol. Later, at a party at Max's villa, investigator Carliss arrives with news that Gina has been killed and that Max is a murderer suspect.
Convinced that a wartime resistance heroine is innocent of a murder charge, Nap Rumbold, a solicitor / private detective travels to France searching for evidence to clear her name.
