A young girl and an older man navigate the criminal underworld of Paris while maintaining a complex, unconventional bond.

The protagonist, Nana, operates within a precarious social framework, relying on her wits and her protector to survive the dangers of the city. They face constant pressure from law enforcement and rival criminal elements, forcing them to adapt their strategies to avoid capture. The narrative utilizes a lean, fast-paced style that emphasizes the immediate physical risks of their lifestyle. The story explores the boundaries of their relationship against a backdrop of urban decay and moral ambiguity.

Readers often note the distinct, cool detachment of the prose which mirrors the cynical nature of the characters. Discussion frequently centers on the moral ambiguity of the central relationship and how it challenges traditional literary conventions. Critics highlight the author's ability to maintain high tension without relying on excessive violence or melodrama. Many readers appreciate the brevity of the work, noting that it allows the atmosphere to remain the primary focus throughout the narrative.