Immortal wanderer Quentin Collins has done his best to stay on the sidelines of the Second World War, but now he's been recruited by the British Secret Service. His mission: to infiltrate the castle of Professor Moloch in the heart of the Black Forest.For the Third Reich is hiding a dark secret - Moloch has been dabbling in the occult, and he's reached out to some very dark forces indeed.Will Quentin be able to stop him? And does dashing agent Sally Green have a score of her own to settle?