Safo is a novel by Alphonse Daudet that explores the passionate and complicated relationship between Juan, a young man from the provinces, and Safo, a woman from the Parisian underworld significantly older than him. Despite their differences in age and social standing, a powerful connection forms between them, leading to a whirlwind romance. However, their love is marked by the societal constraints and judgments they face, ultimately leading to a tragic outcome. Daudet's work delves into themes of love, societal expectations, and the complexities of human relationships, offering a glimpse into the societal realities and emotional turmoil of 19th-century France.