When meek, submissive little Arthur Brownjohn decides to murder his dominating wife Clare he consults all the best authorities, reading the stories of famous murderers and trying to avoid their mistakes. But Arthur has been ineffectual all his life, and he is a bungling murderer. When his plans go wrong he seeks the aid of the flamboyant Major Easonby Mellon, who for various reasons needs to disappear from his shady matrimonial agency. What has timid...