The Secret Service abducts a "rocket scientist" to better protect him against gangsters acting for Chinese agents.

Evelyne, a woman of bourgeois origin, now reduced to dancing in a sleazy nightclub, is reunited with her first love, who has become a successful doctor.

OSS 117 is asked for help by a female acquaintance Muriel Rousset. She beseeches him to retrieve secret documents which have been stolen from Sir Anthony Lead, the father of Anita and Marion. He complies with her wish and no obstacle or danger can hinder him from meeting her expectations.