Lisbon 1944. In the torrid summer heat, as the streets of the capital seethe with spies and informers, the endgame of the Intelligence war is being silently fought.
Andrea Aspinall, mathematician and spy, enters this sophisticated world through a wealthy household in Estoril. Karl Voss, military attaché to the German Legation, arrives on a mission to rescue Germany from annihilation. In the lethal tranquillity of this corrupted paradise they meet and attempt to find love in a world where no-one can be believed.
After a night of extreme violence, Andrea is left with a lifelong addiction to the clandestine world that leads her from the brutal Portuguese fascist regime to the paranoia of Cold War Germany, where she is forced to make the final and the hardest choice.