The collection begins as Agatha finds a new ally in Krosp the Cat (a genetic experiment with a smattering of Napoleon's brain cells) and becomes better acquainted with Gilgamesh, the Baron's son -- who gently breaks the news that Agatha has the spark for Mad Science. Othar Tryggvassen escapes the Baron's lab as the Monster Engine is activated by a revenant, and pandemonium ensues on the city-sized airship as Agatha and Gil battle the awakened behemoth...