The young inventor Nicolette Lampton is living her own fairy-tale happy ending. She's free of her horrible step family, running a successful business, and is uninterested in marrying the handsome prince, Fin. Instead, she, Fin, and their friend Caro venture to the lush land of Faerie, where they seek to put an end to the bloody war their kingdom is waging. Mechanical armies and dark magic await them as they uncover devastating secrets about the past and fight for a real, lasting happily-ever-after for two troubled countries - and for themselves.

Nicolette's awful stepsisters call her "Mechanica" to demean her, but the nickname fits: she learned to be an inventor at her mother's knee. Her mum is gone now, though, and the Steps have pushed her into a life of dreary servitude. When she discovers a secret workshop in the cellar on her sixteenth birthday and befriends Jules, a tiny magical metal horse. Nicolette starts to imagine a new life for herself. And the timing may be perfect: There's a technological exposition and a royal ball on the horizon. Determined to invent her own happily-ever-after, Mechanics seeks to wow the prince and eager entrepreneurs alike.