Edmund Lowe as a German looks exactly like Edmund Lowe as a British aristocrat so a ring of international munitions dealers plans to off the British one and install the German one in his place. So a month later, Edmund Lowe is on his way to the English countryside, where the ancestral manor is haunted by the ghost of a man Lowe is believed to have murdered and dumped the corpse in the bog, where they've got a crazy housekeeper, and Lowe's wife -- I forget which one -- is Valerie Hobson, who is sick, or mentally depressed or something. Plus Lowe's mistress, Wera Engels shows up.
All of which is absolute nonsense and totally unworkable, until Miss Hobson shows up and Lowe falls in love. This is the one plot point I can make sense of, because Miss Hobson is an absolute delight. But I can't figure out how a German Lowe is supposed to fool anyone who's ever met him before, nor how this can be used to sell weapons. With Esther Dale, Spring Byington, and Dwight Frye.