In a psychiatric hospital, Nurse Violet is brutally stabbed. An inmate is found over her body holding a bloody knife, but Dr Lucien Blake is unsure he is really the culprit and begins an investigation.
The police seem to have an open and shut case after finding 23 year-old Nurse Violet Ashby stabbed to death in the mental hospital where she worked as they also find patient David Hoyle near her holding the knife that killed her. Violet was the daughter of retired senior police officer Douglas Ashby, who was Supt. Lawson's superior for 10 years, and wonders if an earlier complaint against his daughter may be behind the killing. Hoyle is undergoing electroshock treatment at the hospital under the care of Dr. Kenneth Laine and his memory is fuzzy at best. Patient Oriel Vogel paints two pictures of Blake, one light and one dark, which sets him on the path to identifying the killer. Written by