Vincent Vivant agrees to Stephan the spy's proposal: he is to cross the border with a mysterious suitcase.

Georges Franju's Judex is an arch, playful tribute to the serials of the influential silent filmmaker Louis Feuillade. Franju shuffles through the plot of Feuillade's lengthy serial of the same name, about an adventurer named Judex whose revenge against the corrupt banker Favraux unleashes a complicated series of schemes.