Blackmailer Windermere (Leslie Perrins) is murdered by one of his enemies Camberley (Donald Wolfit) and stuffed into a trunk. Also looking for Windermere is Ryder (John Loder) who wants to stop his wife Mollie (Lilian Oldland) running off with Windermere! However, when he confronts "Windermere" whom he has never met he instead tangles with Camberley.
Later on, the trunk and the body inside is discovered and Ryder is accused of murder, Camberley having framed him. Amateur detective Lord Peter Whimsey (Peter Haddon) is on hand to try and sort things out...
The film is mostly formulaic though has decent performances, including Haddon who plays Whimsey slightly irrelevantly. The final show down at a railway depot provides just enough peril to bring the film to a satisfying end.
