In Paris in the 1800s, among shadows, catacombs and moonlit rooftops, a being of enormous strength, a black and red cloak and a golden lion mask protects the memory and essence of the city. Neither hero nor villain, but a human and fantastic guardian at the same time, who moves between the real and the surreal.His life is intertwined with Ariane, an aristocratic painter, in a secret bond where art, love and philosophy intersect. Together they challenge conspiracies that seek to rewrite the memory of Paris, facing not only the physical force of enemies, but the shadows of the mind and soul.'The Monster in Us' is a novel of intrigue, surrealism and reflection, where good and evil are not absolute, and human existence is examined in the light of the fantastic and the invisible. Each chapter is a journey between fear, beauty and the memory of a living city.