Penniless governess Blanche Fullerton takes a job at the estate of her rich relations, the Fury family. To better her position in life, Blanche marries her dull cousin, Laurence Fury, with whom she has a daughter. But before long, boredom sets in, and Blanche begins a tempestuous romance with stableman Philip Thorn. Together, they hatch a murderous plan to gain control of the estate.

The woman here is Sylvia Russell: power mad with set goals. In order to achieve those goals she is sadistically devoted to her son and daughter, able to possess and direct them. She subtly ruins her daughter's marriage by corrupting a servant girl and, then, uses her to compromise her son-in-law; slowly breaks her bumbling, unambitious husband's confidence...

A wily old codger matches wits with the King of the Leprechauns and helps play matchmaker for his daughter and the strapping lad who has replaced him as caretaker.

An underhand solicitor receives threatening notes, and the police are called in to protect him.

A schoolgirl disappears for three days after a frank talk with the wife of a Latin teacher she loves.