When Massa is released from prison, he's sure that Luciano, an old freind, is responsible for his incarceration. Massa proceeds to keep watch on Luciano, who has been living with Massa's beloved sister Maria. Feeling doubly betrayed because of his unhealthy adoration for Maria, Massa is determined to get back at Luciano and ends up in a deadly game of roulette.

Robert Hossein, Marina Vlady, Robert Le Beal. A brilliant "little" spy film. Hossein and Vlady play mysterious characters who meet up one night in a lonely cabin in the wilds of Normandy. They are both spies, but whom do they work for-the Allies or the Nazis.

A dozen elegant people are gathered in a writer's desirable mansion. In the grand tradition of Agatha Christie, they all have something to hide.They begin a cruel game of truth, a game where you're not supposed to tell lies. As the questions become more and more intimate and precise, the tempers rise, while outside the storm is raging. Enter a hateful person (played by Paul Meurisse, the nasty headmaster in "Les Diaboliques") who seems to know a lot about them. Someone is murdered. Whodunit?