After mercifully killing her terminally ill lover, Dr. Christine Allison loses her medical license and spends two years in prison. Once she has completed her sentence, the lawyer who prosecuted Christine, Stephen Dane, hires her to care for his emotionally unstable wife, Liane. Christine takes the job, but when Liane's allegedly dead father reappears, Christine sets out to reveal the family's dark secrets.
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.
