Biggles is deep undercover on a reconnaissance operation in Norway. His alias: Norwegian citizen Sven Hendrik. His mission: to map useful landing sites for British aircraft.

But when the Germans invade without warning, Biggles finds himself trapped. Using his passable Norwegian, his fluent German and one hell of a bluff, he is able to pass himself off as a German sympathiser, and is quickly admitted into the German Air Force! This puts him in a unique position to gather vital information on the enemy, and British Air Intelligence instructs him to stay where he is.

Biggles must work quickly to send intelligence back home, whilst also helping the Germans track down a known British pilot believed to be in the area. Only, the pilot’s name is familiar – very familiar, in fact…

Out in the cold and taking orders from both sides, Biggles’ loyalty is put to the test.