A tyrant schoolteacher - Delasalle (Paul Meurisse) in a seedy boarding school has both his wife (Vera Clouzot) and his mistress (Simone Signoret) looking for a way out as he maltreats them both. They decide to work together to murder their tormentor.
The two women drown Delasalle in the bath then dump the body in a swimming pool. When the pool is drained and no body found they start to worry. When his suit is returned, cleaned, they start to panic.
Is he alive? Does someone else know? A spiral of perfectly crafted tension hurtles you to an unparalleled conclusion and an ending you will never forget!
Both frightening and intoxicating in equal measures this film stands the test of time and remains a classic.