When sixteen-year-old orphan Tessa Fell's older brother suddenly vanishes, her search for him leads her into Victorian-era London's dangerous supernatural underworld, and when she discovers that she herself is a Downworlder, she must learn to trust the demon-killing Shadowhunters if she ever wants to learn to control her powers and find her brother.

As the Council attempts to strip Charlotte of her power, sixteen-year-old orphaned shapechanger Tessa Gray works with the London Shadowhunters to find the Magister and destroy his clockwork army, learning the secret of her own identity while investigating his past.

Tessa Gray debería sentirse feliz... ¿Acaso no se sienten así todas las novias? Prometida a Jem, sigue recordando las palabras de Will declarándole su amor. Pero los planes de Mortmain, que necesita a la chica para acabar con los Cazadores de Sombras, cambiarán el destino de Tessa.... Si la única manera de salvar el mundo fuera destruyendo a quien más ama, ¿lo haría? -- p. [4] of cover.