A woman named O submits herself to a rigorous program of sexual discipline and psychological conditioning at a secluded chateau to prove her devotion to her lover. O navigates a complex hierarchy of power and submission, where her identity is systematically dismantled and reconstructed through physical and mental trials. The narrative follows her movement between the chateau and the outside world, maintaining a detached, clinical tone that emphasizes the ritualistic nature of her experiences. The prose operates within a framework of extreme constraint, focusing on the internal shifts in O's perception of agency and surrender. The story explores the boundaries of personal autonomy when faced with total institutional control.

Discussion often centers on the stark, unemotional prose style that contrasts sharply with the explicit nature of the content. Readers frequently highlight the book's philosophical inquiry into the nature of freedom and the paradox of finding liberation through total surrender. Critics often debate the work's status as a transgressive text, noting its influence on subsequent erotic literature and its complex portrayal of gender roles. The narrative's clinical tone serves to distance the reader from the protagonist's suffering, forcing an analytical engagement with the themes of control and obedience. Many readers observe that the book functions more as a psychological study than a traditional narrative, prioritizing the internal state of the subject over external plot progression.