François Perrin, a bumbling violinist arrives at Orly airports wearing a black shoe on one foot and a reddish-brown one on the other. There he is unknowingly chosen without his knowledge to play the role of an international fearsome spy by Perrache, the assistant of the head of secret service Colonel Toulouse.
Toulouse comes up with a plan to throw his ambitious subordinate off. He decides to send him on a wild goose chase. Consequently, Milan continues to watch Perrin but his commonplace behaviour makes him even more suspect. Out of desperation, he uses the services of Christine, a pretty blond spy and François quickly falls in love with her.
Le Grand Blond avec une chaussure noire
The Tall Blond Man with One Black shoe