Mark Girland's problems begin when a beautiful blonde is found lying on a dark deserted quai in Paris - the initials of the top Chinese atomic scientist tattooed on her upper thigh.

The girl is suffering from acute amnesia. Girland, desperate for money, is ordered by the CIA to get any information he can - by posing as her husband.

But the appeal of the mission begins to wear thin when Girland discovers he has involved himself in a life and death race to extract vital atomic secrets from the scientist's beautiful mistress.