A woman returns after twenty years to Toulon where her husband, who collaborated with the nazis, was murdered. Her motives are unclear.

Christian, an art critic, must write a study on the painter René Dimanche in order to understand why he did not produce anything for eight years. He asks his friend Ingrid to help him break through this mystery.

Émile targets women he believes are too depressed to go on living. As multiple victims fall to his suffocating white scarf, an inspector resorts to unorthodox methods to get him with the assistance of a potential victim.