A flea serves as the unlikely narrator of a scandalous tale involving a young woman coerced into sexual servitude by a corrupt priest. Bella and her lover Charlie find their private moment exploited by a voyeuristic clergyman who uses the encounter to blackmail the maiden into a life of subjection. The narrative follows the flea as it observes the priest's hidden life, utilizing its unique perspective to expose the hypocrisy within the church. The story unfolds as a dark, satirical examination of Victorian morality and the hidden appetites of those in positions of power.

This work is widely recognized as a foundational text within the genre of Victorian erotica, noted for its transgressive themes and unconventional narrative voice. Critics and scholars often analyze the book as a biting commentary on the era's rigid social and religious structures. While the subject matter is provocative, the text remains a significant artifact of 19th-century underground literature. Its legacy has been further cemented by its adaptation into various media, including the 1970s film that introduced the story to a modern audience. The narrative continues to be studied for its bold subversion of traditional moral narratives.