Ben the tramp, the awkward Cockney with no home and no surname, turns detective again - and runs straight into trouble. Ben encounters a dead man on a London bridge and is promptly rescued from the same fate by a posh lady in a limousine. But like most posh ladies of Ben's acquaintance, this one isn't what she seems. Seeking escape from a gang of international conspirators, Ben is whisked off to the mountains of Scotland to thwart the schemes...