On a peaceful Sunday afternoon, Arthur Rowe comes upon a charity fete in the gardens of a Cambridgeshire vicarage where he wins a game of chance. If only this were an ordinary day. Britain is under threat by Germany, and the air raid sirens that bring the bazaar to a halt expose Rowe as no ordinary man. Recently released from a psychiatric prison for the mercy killing of his wife, he is burdened by guilt, and now, in possession of a seemingly innocuous prize, on the run from a nest of Nazi spies who want him dead. Pursued on a dark odyssey through the bombed-out streets of London, he becomes enmeshed in a tangle of secrets that reach into the dark recesses of his own forgotten past. And there isn't a soul he can trust, not even himself. Because Arthur Rowe doesn't even know who he really is.