"Blake and Mortimer" is a comic series centering on two British heroes, a military intelligence officer and a nuclear physicist. The pair often find themselves embroiled in various international intrigues, battling against super-powered villains, alien invaders, and ancient civilizations. The series is known for its detailed artwork and complex plots, often involving science fiction and paranormal themes.

In this detective novel, the famed French inspector investigates the murder of a seemingly ordinary man found stabbed on a Paris boulevard. As the inspector delves deeper, he uncovers a life filled with secrets, including a double life involving a mysterious woman and a hidden apartment. The case challenges the inspector to navigate through layers of deception to uncover the truth about the man's life and death, revealing the complexities of human nature and the unexpected connections between people in the bustling city of Paris.