When a worldwide plot to divert gold which was placed in central banks all across North America is investigated, Pierre Gauthier is summoned to lead the inquiry. Gauthier however is soon betrayed, and finds himself going head to head with the "capo" of Montreal Mafia.
Geneviève Saint-Louis, a bachelor and neurotic careerist, refuses any form of engagement. Her aunt Aline, a former cabaret singer, arrives at her home with the ulterior aim of avoiding placement in a reception center.
To carry out the "robbery of the century", Charles recruits the friends with whom he made the 400 blows. The night of the robbery, they get caught by police, but one of them runs away with the $2 million. Upon their release from prison, the thieves are shocked to learn that they will get their...