In the middle of the first world war, Barcelona is the center of multiple operations related to war, although Spain is a neutral country.

A Spanish police chief hires an undercover agent, Eagle, to infiltrate a gang of heroin smugglers. Infiltrating the gang, he uses a female agent as a point of contact. However he discovers that there bigger goings-on than dope. The gang is involved in the transportation of smuggled uranium for the manufacture of nuclear arms for sale to Libya and other aspiring third world countries.