Peter Jones a British diplomat in France, suspects his wife Margaret of having an affair. He hires a private detective, who reports that Margaret has rented an apartment. It then turns out that her live-in lover is a pet chimpanzee she calls Max.
Co-writer Carrière, producer Silberman and actor Vukotic were all frequent collaborators with Luis Buñuel, and the film resembles his work in its understated, unsensational treatment of frequently outrageous events.