"Lanyard" (Warren William) and honourable factotum "Jamison" (Eric Blore) are in Havana on the trail of a rare stamp when they encounter "Patricia" (Frances Robinson) who wants to pinch their cab for an urgent trip to the airport. Charmed, the "Lone Wolf" agrees but after a few moments wishes he hadn't. It turns out that she is embroiled in a ransom plot that involves a kidnapped businessman, $100,000 and her poor old fiancé "Scotty" (Bruce Bennett) who is likely to fry if they don't get to the truth and free the victim in time. Of course, as soon as he is seen anywhere near the investigation, "Insp. Crane" (Thurston Hall) and the hapless "Dickens" (Fred Kelsey) are back on his case hoping and praying that this might be the time they finally manage to apprehend him. It's not the best story here, it's a bit thin and a little too contrived, but there are plenty of amiable one-liners and some fun with boats that sees "Dickens" getting a well deserved ducking once or twice.