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.
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?
A key role in Khalil's latest plan is at stake. Charlie is getting closer to the Palestinians and announcing that she is ready to war. Becker remains in London when he realizes that the threat is directed towards an upcoming British ground event.
Season finale. Charlie is torn between her love for Becker, his respect for Khalil and his personal desire to do the right thing. Kurtz and his men follow the evolution with great excitement, worried about which side Charlie has chosen.