Dr. Susan Hayward makes a tragic mistake when she leaves her Canadian practice to follow her ailing, married lover to England. Dying slowly and in great pain, her love begs her to help him die quickly. With great compassion, she does so with a large morphine injection. Unfortunately, her mercy lands her in court where she must face the ruthless and ambitious prosecuting attorney Peter Finch. Hayward ends up serving two years in prison. Afterward, her medical practitioner's license is revoked and she is left destitute and desperately alone until an anonymous party contacts her and invites her to take a job caring for the man's mentally ill wife. She goes to check out the situation and discovers the man to be Finch. Apparently his wife, Diane Cliento went mad after her father accidentally died. She accepts the position and soon finds herself deeply involved in a complicated situation where nothing is quite as it seems and where a death again leads her to stand trial in court for a crime she did not commit.