From the back cover: The town of Pott Winckle owes its prosperity to the firm of Wibbley Ware. Naturally, when the owner's daughter is murdered, the call goes out for Scotland Yard's finest. Once again, Dover is off, the reluctant Sergeant MacGregor in tow. All Dover has to do to cinch this one is settle back in Wibbley's Rolls Royce, perhaps bend a bit of evidence, or maybe a few fingers. Oddly enough--and not for the first time--his methods result in something resembling a solution.