James Stephenson is Philo Vance in this movie. He's in Vienna, tracking down a rumor that Richard Kipling has been selling his military airplane designs to foreign governments, instead o the US, as he is required by contract to do so. Vance gets the plans, but they are taken from him by the local police. As a result, when he returns to the States, he reports to Henry O'Neill that he has no proof that would stand up in court. Stephenson and O'Neill go to Kipling's home, only to discover him dead bebehind a locked door. He seems to have committed suicide -- by shooting himself with a bow, a gun, and a blunt instrument.
It's a remake of The Kennel Murder Case, and Stephenson's posh British accent and unhurried motions fit the character pretty well. The updating of the maguffin from Chinese art to airplane plans shows where Warner Brothers' thoughts were about the international situation. With a plethora of suspects, including Margot Stevenson, Sheila Bromley, Ralph Forbes, and Bo Ling, it's a pretty good updating of S. S. Van Dine's mystery.