The story of a troubled relationship festering between two couples: young Alain Getty (Laurent Lucas), a home automation engineer, and his wife, sweet Bénédicte (Charlotte Gainsbourg); and middle-aged Richard (André Dussollier), Alain's boss, who is married to the mysterious Alice (Charlotte Rampling). The encounter does not leave the young couple's harmony unscathed. The discovery of a mysterious rodent's corpse blocking the waste pipe of their kitchen sink does nothing to help and portends the bursting of irrationality into a hitherto orderly life.