When Paul falls hopelessly in love with novelist Nicole Longet (Claudine Longet), he flees, but she interprets his action to mean that he is a spy colleague of Mike Allen (Stephen McNally) until the agent reveals Paul's secret.

Paul becomes involved in a dangerous Yugoslavian adventure, seeking hidden diamonds and documents when Gillian Wales (Joan Collins) mistakes him for an underworld character.

Paul and racing star Nick Cooper (Pat Harrington Jr.) assist a Czech scientist escape his country with tragic results.

Paul is asked to be a go-between to exchange the husband of Alicia Stuyvesant (Janice Rule) for an East German agent being held in the US.