parents. Meanwhile, a network of MI6 spies is attempting to decipher an encrypted Luftwaffe radio signal which mentions the new Freya-Ger't - a rudimentary form of German radar equipment. Arne's relationship with Hermia Mount, an MI6 analyst draws him into underground politics, putting him under surveillance by the Danish security forces - and by one man in particular who has a personal motive to see Arne fall. It is only a matter of time before the brothers' paths converge in a united effortto overcome the Nazis. A disused Hornet Moth biplane is their only means of getting a vital message to the British.