The novel presents the story of a wealthy Chinese woman who, upon reaching her 40th birthday, decides to change the course of her life. She arranges a concubine for her husband to take over her marital duties and embarks on a journey of self-discovery and liberation. Throughout the narrative, she explores the constraints of traditional roles and the possibilities of intellectual and spiritual freedom, forming a deep connection with a foreign missionary. This relationship challenges her beliefs and the societal norms of the time, leading her to question the very foundations of her existence and her place in the world.

Set in the 1840s, the novel follows Miranda Wells, a young woman from a modest farming family who is swept into the world of the wealthy and enigmatic Van Ryns when she is invited to their opulent Hudson Valley estate, Dragonwyck. As Miranda becomes enamored with the luxurious lifestyle and the charming but imperious patroon, Nicholas Van Ryn, she soon discovers that the glittering façade of Dragonwyck conceals dark secrets and psychological twists. Amidst a backdrop of social change and Gothic mystery, Miranda must navigate her way through a maze of romance, obsession, and the struggle for power, ultimately confronting the dangerous consequences of her own ambitions and desires.