Marc is a French secret agent whose only weapons are judo and karate. With the help of his sidekick Jacques, the duo goes to protect a noted scientist from falling into the hands of a gang of underworld thugs. Marc finds love with one of the female gang members who turns out to be a double agent with the British Secret Service.
as Marc Saint-Clair, aka 'le Judoka'
as Vanessa
as Dominique Berg
as Catherine Demange
as Thomas Perkins
as Jacques Mercier
as Oscar Meyer, sound engineer
as Commissioner Chaumont
as Paul Vincent, the boss with the glass eye
as The young singer (uncredited)
as The mariner (uncredited)
