The Shadowhunter Cordelia Carstairs seems to have everything she ever wanted at first glance: Engaged to her true love James Herondale, she is building a new life for herself in Edwardian London. But happiness is merely a facade: Her marriage will be a lie, as James' heart belongs to the mysterious Grace. Meanwhile, a cruel murderer embarks on a seemingly random quest for revenge among London's Shadowhunters. Cordelia and her companions desperately try to stop him, only to become further entangled in their own secrets and lies.