Samantha Crill can read the hearts of mechanical devices and transform them into what they long to be. In a steam-powered Victorian England where only the wealthy can afford such sophisticated contraptions, the law does not look kindly on Naturals who destroy these purchases. Barely able to resist the demand of the devices, Sam becomes a danger to everyone around her, not in the least because the mechanicals show little restraint once changed.Nathaniel Bowden, cabin boy on the oldest of the East India Trading Company's steamships, intends to learn everything he can in the hope of becoming a captain in this age of productivity. He's eager and willing, but his despised noble background and the engineer's unprovoked loathing threaten his position with the crew.If Sam can't learn to control her nature, the engine's whispers combined with Nat's curiosity will put his future -- and both their lives -- at risk.