Star-crossed lovers Thérèse and Laurent think they've gotten away with murder after Thérèse's weakling husband "falls" from a speeding train. But when forced to contend with a blackmailer's demands and the mute accusations of Thérèse's mother-in-law, it's only a matter of time before the law, their passion or blind chance trips them up.
During the cold and rainy off-season a man arrives in a seaside town and, giving his name only as Pierre, checks into the only hotel which remains open. His arrival arouses curiosity and a degree of suspicion, as people note that he appears to know the area, yet gives no explanation for his presence at that bleak time of year in the dead-end town.
Michel Piccoli plays a police inspector whose best friend is murdered on the orders of gang boss Charles Vanel. The inspector knows full well that Vanel is too crafty and well-connected to ever stand trial for his crime, so he carefully lays a subtle trap for his adversary. Unfortunately, both Piccoli and Vanel are thwarted by a pair of scheming females.
