François Billetdoux and André Tabet wrote a screenplay based on Charles Exbrayat 1962 novel of the same name.

Brigitte Bardot and Anthony Perkins star as the protagonists in the Franco-Italian production.

A Soviet spy (Perkins) is on an official mission to obtain sensitive information from NATO about military mobilization.

The klutzy intelligence operative has to rely on the instinct of his new partner and love-interest Penelope Lightfeather (Bardot) as they traipse across the countryside, avoiding counterintelligence agents and distrustful communist operatives.

Production was affected for three days after Perkins suffered a sprained ankle while filming chase scenes through the woods with Bardot.