Inspector Lavardin is called to a provincial village to investigate a murder – only to find that one of his ex-lovers is the victim’s widow.

A young couple: Victor is a musician, Claire is a secretary in a publishing house. Their daily life seems so disappointing, so monotonous, that they begin to spend their time daydreaming, both creating their own imaginary world. At the office, she writes the story of an heroine's imaginary life. He collects material to compose an opera which glorifies the conquistadors.

During a televised debate on the Algerian war in the early 1980s, Professor Paulet denounced the methods of Captain Caron, killed in action in 1957. The widow of the captain, Patricia, decided to file a defamation suit.