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

In London, Kurtz's team prepare for the next stage of the operation as Charlie waits and wonders if Michel's people will make contact.

Charlie joins a group of revolutionaries in Lebanon, with no one to save her if she is exposed as a spy. She works to earn the trust of Khalil and Michel's sister, Fatmeh.

Charlie prepares for her part in Khalil's next strike. But is she still playing a role, or has she switched to the other side?