The book follows Lucas Corso, a book detective who is hired to authenticate a rare manuscript by Alexandre Dumas. As he delves into the investigation, he finds himself entangled in a mystery involving two other books: a rare edition of "The Three Musketeers" and a satanic text, "The Book of Nine Doors of the Kingdom of Shadows". The narrative becomes a complex puzzle as Corso uncovers connections between the books, while also dealing with a seductive woman who seems to have stepped out of a Dumas novel, a mysterious killer, and a group of bibliophiles obsessed with Dumas. The lines between fiction and reality blur as he gets closer to the truth.

This book is a satirical novel that follows the adventures of a man from the small village of Rupcha, who, inspired by the historical figure Vasco da Gama, dreams of exploring and conquering new territories. Despite his grand ambitions, the protagonist's journey is filled with humorous and absurd obstacles, reflecting the clash between his lofty aspirations and the reality of his mundane, rural life. Through a series of comedic misadventures, the novel critiques societal norms and the human condition, employing irony and exaggeration to explore themes of ambition, identity, and the quest for meaning in a seemingly indifferent world.