The Allies called him Garbo. The Nazis dubbed him Alaric. Both sides in World War II were sure Juan Pujol Garcia was their man. In reality, Pujol was a double agent - and his final allegiance was to the Allies.

From the relative comfort of Lisbon, Garbo fed false information to the Nazis and fabricated a network of phantom agents across Europe. Although he never fired a single shot, Garbo helped to save thousands of lives, most notably by misinforming the Germans about the timing and location of the Normandy D-Day invasion. In his inexhaustible imagination he even went so far as to secure death benefits from the Nazis for an imaginary agent's nonexistent widow.

In this documentary thriller, director Edmon Roch artfully interweaves propaganda footage, interviews with intelligence experts and key players in Garbo's life (as well as with Garbo himself), and clips from Hollywood films to conjure forgotten and living memories, heroes and spies, secrets and lies.