A criminal mastermind, Haghi, wishes to get his hand on some Japanese government secrets. In order to do so, he enlists the talents of the Russian spy Sonja Baranikowa, who must use her feminine wiles to procure information from a debonair young spy, known only as his number, 326. Haghi's immoral plans are considerably complicated, however, when Sonja falls for the man she is supposed to be manipulating.
