Andrew Dax, a novelist (Patrick Holt) and his wife Kate (Diana Dors) are sleeping peacefully in their new cottage when a mysterious older lady (Cicely Courtneidge) arrives, apparently stranded in a storm. She hands the writer her gun and some jewelry for safe-keeping, and asks if she can stay. Andrew and Kate agree but when, someone shoots her during the night and Andrew is accused of the crime, he's forced to turn detective to defend himself in this classic comedy.