Mississippi Mermaid

In Reunion Island in the Indian Ocean, the owner of a cigarette factory Louis Mahe is engaged through correspondence with Julie Roussel and he does not know her. When Julie arrives in the island to get married with Louis, he waits for her in the docks but Louis does not recognize Julie in the passenger vessel and finds that she is totally different from the picture she had sent to Louis. They get married and Louis shares his bank accounts with her. When Julie's sister writes a letter to Louis asking her sister to write to her, Louis discovers that the woman is not Julie who is missing. Further, he finds that the woman has cleared his bank accounts and left the island. Louis and Julie's sister hire an efficient private detective Comolli and Louis travels to France seeking the woman, but he has a nervous breakdown in Nice and is submitted to an intense sleeping therapy in a clinic. He recovers and finds that the woman, actually Marion Vergano, works in the Phoenix Club Prive in Antibes and lives in the low-budget Monorail Hotel. Louis breaks in her room and when she arrives from the club, she tells that she was happy with him but her former dangerous lover Richard had blackmailed her. Louis is still in love with Marion and escapes with her to the countryside. But Comolli is chasing Marion in France accused of murdering Julie.