Espionage, adventure, romance, in familiar fashion, as young Anthony Rossiter of the intelligence investigates his older, adopted brother -- also in the Intelligence and the Gestapo, playing both ends. A parcel, guaranteeing his safety from Gestapo retaliation, is sent in Anthony gets into the hands of Delia, his fiancee, and Anthony loses the parcel and Delia for a time, his brother permanently. Spry.