A special train has been commissioned to convey secret NATO funds from Paris to Brussels. Criminals on both sides of the channel plan to hijack the train: on the French side, Arthur (Jean-Paul Belmondo), a resourceful small-time crook and his pal Anatole (Bourvil); on the English side, the Brian (David Niven), a brilliant super criminal wanted all over the world. Standing in their way is Scanapicco (Eli Wallach), a gangster who wants “the Brain” dead for more than one reason. This is the original uncut and un-dubbed French version of the film. The US version was 15 minutes shorter and was dubbed in English.