A meek, mild-mannered man begins to suspect that his beautiful wife is poisoning him after he realizes that his acute stomach aches occur only after he eats at home. As a result, he investigates the death of his predecessor-- his wife's first husband.
Mathilde and her husband, who works in a minister's office, are not rich. Mathilde, however, loves beautiful clothes and her husband loves her too much that he lets her do anything she wants. One day they receive an invitation for an important party and she wants to look her best. She borrows a beautiful diamond necklace from her rich friend, but then the necklace gets lost.
Outvoted by his board of directors and hounded by the press, the Parisian CEO of a large company finds refuge for the weekend in a country inn run by his ex-wife.
