In 1945 Hitler unleashes the Blood Death on Britain as his final act of vengeance.
Hoke, an American pilot and one of a tiny minority with a blood group unaffected by the killer disease, has survived among the debris and the dead of London for three years.
Now in '48, he is running for his life - hunted through the ruined city's ravaged streets by a desperate group of slow-dying Fascist Blackshirts.
They're after his blood.