A young girl in 16th-century Spain experiences a miraculous vision that forces her to confront the rigid expectations of her society and the church. Catalina, a crippled girl, claims to have seen a vision of the Virgin Mary, an event that triggers a series of investigations and social upheaval in her small town. She must navigate the skepticism of local authorities and the intense scrutiny of the Inquisition, which seeks to determine the validity of her claims. The narrative follows her transformation as she grapples with the weight of her newfound status and the personal cost of her public revelation. Maugham employs a third-person perspective to examine the intersection of faith, power, and individual agency within a strictly hierarchical environment.

Discussion often centers on Maugham's departure from his typical contemporary settings to explore historical and religious themes. Readers frequently highlight the author's detached, analytical prose style, which maintains a clinical distance from the emotional intensity of the subject matter. Critics often note that the book serves as a meditation on the nature of faith rather than a traditional narrative of religious devotion. The pacing is described as deliberate and measured, reflecting the author's interest in the social mechanics of the period. Many readers find the work to be a subtle critique of the intersection between political authority and spiritual claims.