Into this uncertain world comes Harry Brett, a privileged young man who was recently traumatized by his experience in Dunkirk and is now a reluctant spy for the British Secret Service. Sent to gain the confidence of Sandy Forsyth, an old school friend turned shadowy Madrid businessman, Brett finds himself involved in a dangerous game and surrounded by memories. Meanwhile, Sandy’s girlfriend, ex-Red Cross nurse Barbara Clare, is engaged in a secret mission of her own—to find her former lover Bernie Piper, whose passion for the Communist cause led him into the International Brigades and who vanished on the bloody battlefields of the Jarama.