Ian Laking is pathologically jealous of his beautiful wife, and obsessed with murder. His only hope lies in treatment by Dr. Morelle, the psychiatrist and criminologist. However Laking, suspecting his business associate Dyke Fenton of being his wife's lover, is plotting revenge. Dr. Morelle and his secretary, Miss Frayle, become caught up in the drama of jealousy and revenge. When the plan fatally recoils upon Laking himself, will Dr. Morelle be able to unmask the murderer?