A brilliant tale of wartime espionage from the master storyteller

In June 1941 a baffling Luftwaffe radio message mentioning a new invention with the code name Freya (the Viking goddess of love) is picked up by the decoders of Allied intelligence. Hermia Mount, a British intelligence analyst, suspects the existence of an experimental radar station on the coast of Denmark. Meanwhile, young Harald Olufsen, a brilliant Danish student, has spotted an unusual installation near his island home.

Unable to resist a challenge, Harald is soon drawn into Hermia's investigation but, when he finally learns the truth, he finds the only way of getting to England with the information is in a near-derelict Hornet Moth biplane, mouldering away in the nave of a ruined church...