Bourdin (Bourvil) is a ticket puncher on the Paris subway who writes a book about a train robbery in this routine comedy. After he is turned down by several publishers who find his story implausible, Bourdin recruits a gang of crooks to carry out the plan to prove it is possible. The plan backfires and he gets mixed up with thugs led by the notorious underworld figure Filippi (Paul Meurissa). ~ Dan Pavlides, Rovi