Charlie, a fiery and brilliant young actress, meets a mysterious stranger on the beach in Greece, and he draws her into an international espionage operation.

Charlie is recruited with the promise of the role of a lifetime to infiltrate a dangerous revolutionary cell. As a cover story, she and Becker must pose as lovers.

Charlie drives a car laden with explosives to a drop-off in Austria, while Kurtz and Becker race to save her from a fatal mistake.