In an alternate history where steam power replaced electricity entirely, the island of Edward runs on vapor — its vehicles, gadgets, and weapons all driven by pressure rather than current. The island's legitimate ruler, King Wizar, sits imprisoned by his own prime minister Vlad, who used the king's good nature against him. Below the surface of Edward's elegance, the citizens of Edoalds are suffering: wastewater plants built to serve the upper class have poisoned the drinking water and the people who depend on it. Lucian Taylor holds Imperator Duran personally responsible for his younger sister's death. He has built his entire life around finding Duran and making him answer for it.