In this gripping French thriller directed by Henri-Georges Clouzot, the plot revolves around a tyrannical school headmaster, his frail wife, and his mistress, who conspire together in a chilling plan. The film stars Simone Signoret and Véra Clouzot, whose performances add depth to this suspenseful narrative. Known for its masterful tension and unexpected twists, the movie is a classic in the psychological horror genre. Interestingly, it was a significant influence on Alfred Hitchcock’s “Psycho.” For those interested, it can be viewed for free on 123Movies / Movies123.