Laurence Clavius

Paris, France, December 1946. Jenny Lamour, an ambitious cabaret singer, and Maurice, her extremely jealous pianist husband, become involved in the thorough investigation of the murder of a shady businessman, led by Antoine, a peculiar and methodical police inspector.

After three weeks and a long, hot voyage across the Pacific, an ocean liner finally arrives at its destination, Ecuador. That evening, the event is marked by a masked ball and a magic show.