A clandestine romance between a high-born woman and a young astronomer challenges the rigid social hierarchies of Victorian England. Viviette, a lady of the manor, initiates a relationship with Swithin St Cleve, a man nine years her junior and of lower social standing. Their connection faces constant pressure from societal expectations, financial instability, and the complications of Viviette's existing marriage. The narrative unfolds with a focus on the tension between individual desire and the restrictive moral codes of the nineteenth century.

Discussion often centers on the unconventional nature of the relationship and Hardy's bold critique of Victorian social norms. Readers frequently highlight the author's use of astronomical imagery as a means to emphasize the insignificance of human concerns against the vastness of the cosmos. Critics often note the novel's controversial reception upon its initial release, particularly regarding its depiction of the Church and its treatment of marriage laws. The pacing is frequently described as deliberate, allowing for deep character introspection and the gradual development of the central conflict. Many readers find the narrative's focus on the intersection of science and human emotion to be a distinct feature of Hardy's broader body of work.