When a man is murdered all the clues point to Julien Vercel as the prime suspect. He knew him, his fingerprints are on his car and, as the police eventually discover, he was having an affair with Julien's wife.
However, Julien’s secretary Barbara Becker is sure something is not quite right with this state of affairs and begins her own investigation into the matter.
The last film that Truffaut ever made, Finally, Sunday is an inspired dip into fresh territory for the legendary auteur as he takes on classic film-noir with, at once, humorous and nail biting effect.