In the hope of saving Charlotte and the Institute, Will, Jem, and Tessa set out to unravel the secrets of Mortmain’s
past-and discover unsettling Shadowhunter connections that hold the key not only to the enemy’s motivations, but also to the secret of Tessa’s identity. Tessa, already caught between the
affections of Will and Jem, finds herself with another choice to make when she learns how the Shadowhunters helped make her a “monster.” Will she turn from them to her brother, Nate, who has been
begging her to join him at Mortmain’s side? Where will her loyalties-and love—lie? Tessa alone can choose to save the Shadowhunters of London…or end them forever.