Ebonheben is a city of mechanical wonders, steam technology and gas lamps, where technocrats fight conservationists and street kids fight corrupt officials. The disappearance of the daughter of a famous astronomer creates a huge commotion and sets in motion the gears of a secret mechanism that constantly points to Leo. The story of a little boy takes root in an eerie abyss, covered in a bloody fog. In its depths, horror gathers strength, capable of destroying the usual order. Who is Leo really, what happened to the owner of the mechanical cat, and what is the fate of the eternal conflict between nature and technology? Editor's comment: The complex universe of the novel, working like a steam clock, together with the cunningly arranged Using the mechanism of a detective plot, it will give readers an exciting adventure to an amazing place that captivates with its legends - the city of Ebonheben.