February 1941: Foyle again pursues a position that would allow him to contribute more to the war effort. But a local cuddle investigation sidetracks this endeavor as Foyle finds himself caught between rival spy organizations.

Foyle investigates a suspicious passing at Dr Wrenn's famous clinic, which specializes in treating men of the Royal Air Force suffering from severe burns. As well as cuddle, he finds a web of adultery and sabotage.

Foyle investigates a dramatic and complicated series of events, which lead him to visit a squadron of Spitfires flying out of an R.A.F. airfield. He finds the case unsettling.

A.C. Rose orders Foyle to delegate his investigation of black marketing ring and personally look into the possibly seditious acts of a Socialist activist.