German exchange student Klaus Hitz is more interested in making money than in asking questions about his work assignment. He doesn't know that the industrialist father of his punk girl friend is using him in a terrorist conspiracy to kill everyone in the United States with a mass mailing of a scratch and sniff virus. The plot begins to unravel when a Polish nurse brings blood samples from Libya and alerts a CIA agent. While the CIA and FBI track down the terrorists, Klaus Hitz gradually figures it out. How can he avoid being murdered or imprisoned for being naive?