A young aristocrat enters into a clandestine, unconsummated marriage that triggers a sequence of betrayal, madness, and ruin. Basil, the protagonist, defies his social standing to marry the daughter of a linen-draper, only to find his life dismantled by the consequences of his impulsive choice. He faces opposition from his rigid family structure and the volatile, deceptive nature of his new wife. The narrative unfolds as a cautionary examination of class collision and moral transgression in nineteenth-century London.

Discussion often centers on the provocative nature of the plot, which challenged the social mores of the Victorian era upon its initial publication. Readers frequently highlight the intense, lurid atmosphere that Collins constructs to mirror the protagonist's internal and external collapse. Critics often note the effectiveness of the novel in portraying the friction between the declining aristocracy and the rising merchant class. The pacing is generally regarded as deliberate, prioritizing the psychological unraveling of the characters over rapid action sequences. This work remains a significant point of interest for those examining the evolution of the sensation novel genre.