Harwood (Edmund Lowe) is an American private detective in Europe, he discovers a dead body in his hotel room but by the time the authorities turn up the body is gone!
Insurance agent Caryl Fenton (Constance Cummings) joins Harwood for a new job in Scotland but Harwood is more interested in finding out what happened to the corpse! Not long after Caryl and Harwood are involved in their first train crash, but not before Harwood is reunited with the corpse, on the train!
A highly entertaining, witty and fast moving film, the two leads trading quips nearly as fast as the plot. The plot though may have a few holes here and there but it doesn't linger on any one scene long enough for it to really matter. The twist at the end is good too when the mastermind behind the mayhem is finally revealed.