Ellen Creed is a housekeeper who looks after Leonora Fiske, a retired actress living in the English countryside. When Ellen's eccentric sisters visit their sibling at Leonora's home, tensions soon lead to murder.

Mrs. Crabtree's health is poor, and Mr. Crabtree is out of work, having been let go from his job because his personnel manager thought he had become too old for the work. He receives a call from an employer to whom he had written, and the employer sends his secretary to discuss the job with Crabtree. He begins working in a private office, reviewing financial information and writing reports, but he is baffled by his employer's secretive nature. Then one day he arrives at the office to find his employer waiting for him, with a most unexpected assignment.