“Flame Squadron” they were called in the R.A.F. But to the baffled pilots of the Luftwaffe they were known as “Flame Devils”.

When an aircraft was shot to pieces, cartwheeling across the sky in a mass of flames, somewhere in that blazing Spitfire a cool fighting brain still functioned, a finger still pressed the firing button. Long after any pilot must have perished, each plane carried on flying.

As the Luftwaffe’s terror grew, one of Germany’s top spies was sent to ferret out the secret of the “Flame Devils”…