As John Dannahay, a CIA agent stationed in Rome, plans the overthrow of an African government, he discovers one of his men has been in contact with agents from the other side. Before he can confront the traitor, the man seemingly goes crazy, sniping several people before taking an adulterous couple hostage in a hotel room.

Tony Musanteas John Dannahay
Claudia Cardinaleas Aliki
John Forsytheas The American Ambassador
John Steineras Donald Grayson
Renzo Palmeras Parenti
Anna Zinnemannas Renata
Fabrizio Jovineas Inspector Moreno
Wolfango Soldatias Harry Lambert