Philippe Noiret is splendid as inspector Molinat in this typical French thriller. Marie (Anne Roussel) and Leroyer (Guy Marchand) give a good response to the strong one-liners of inspector Molinat. But it is based on the novel "Widow's Walk" by the American Andrew Coburn. The director and script-writer Granier-Deferre sucked all the suspense of this book by putting it into masterly dialogues.