The incredible story of three promiscuous friends who share more things than they think. Ernest, Jobelin and Marjavel collect pranks and exchange wives and mistresses in the greatest secrecy. But their joyous merry-go-round threatens to collapse at the slightest misstep.

A group of children and their teachers from a Protestant school in Northern Ireland go on a trip to Paris.

A writer tries unsuccessfully to sell his screenplays and plays. He marries a television editor, but she only wants to fuck him and thinks nothing of his work. He then remembers his old Parisian lover Rita, calls himself Rita from then on and becomes her wife. When a French director stages a play of his, he meets Rita again in Paris and the two women become a happy couple.

Architect Dumas dies from a bullet of his own gun in front of his house. The police suspect his young Swedish wife Catherine and her English lover Tom Hastings. After numerous interrogations, in which they entangle themselves in contradictions, they try to flee, but are soon both caught and brought to trial, he in England, she in France. Only when Catherine keeps on proclaiming her innocence, superintendent Corbier finally considers believing her.