Charters and Caldicott are touring the Middle East. After visiting Saudi Arabia they find themselves in Bagdad where they are mistaken by a group of German spies for the messengers who are to carry a song record by beautiful singer La Palermo which contains secret instructions of the German Intelligence. Realizing their error, the German spies follow Charters and Caldicott to Istanbul and Budapest, trying to eliminate them and retrieve the record.
When a wealthy newspaper proprietor passes away, his crooked business partner moves to secure the deceased's fortune by substituting a false will. But 'Corona' Flanagan is onto the fraudster, and his efforts to unmask the villain see him popping in and out of jail – which isn't all that bad, since the governor is an old friend of his – and dressing up as a Russian countess...
When a pretty Wren faints in a crowded train, Private Bud Flanagan and Captain Ches Allen are quick to render first aid. But over Bud's head, a heavy kitbag wobbles; it falls and scores a direct hit, knocking him unconscious. What follows is a dream sequence involving Ches, the Wren and Bud himself in a series of hilarious adventures as well as a magical medley of the duo's best-loved musical numbers!
