Set in early 20th-century Stockholm, the novel follows a disillusioned physician who becomes entangled in a moral dilemma when a patient, the unhappy wife of a repugnant clergyman, confides in him about her distressing marriage. As he grapples with his own ethical boundaries and unrequited love for her, the doctor contemplates taking drastic action to free her from her oppressive situation. The narrative delves into themes of morality, loneliness, and the complexities of human desire, ultimately exploring the profound consequences of crossing ethical lines.