A Russian spy is supposed by the British Secret Service to steal some faked orders, but he is too stupid to succeed. His girlfriend tries to help him, but it seems he is too foolish to succeed.

Harry Compton, a naive young man, is dismissed by the bank in which he worked. Desperately in need of a job, he agrees to become a Soviet spy. Assigned with the mission to steal the "Avalanche" secret file from Sir Dumfrey, he gets to know Penny, a ravishing but somewhat dumb dressmaker. The young woman spontaneously offers to help Harry in his actions. But they are pursued by bad luck. What's more, they keep accumulating blunders. To make matters worse, the MI6 has learned of the operation...—Guy Bellinger

Inexperienced agent Harry Compton, a Soviet spy in London, embarks on a challenging mission to retrieve the crucial "Avalanche" dossier: the general mobilization plan of the NATO fleet in the event of a global conflict. However, as the bumbling operative plans his next move, bent on stealing the secret file from unsuspecting Sir Reginald Dumfrey, the essential document keeps changing hands, and Harry makes a pivotal discovery. Is there more to statuesque blonde and effortlessly charming love-interest Penelope Lightfeather than meets the eye?—Nick Riganas