The demond Lilith has been destroyed and Jace freed from captivity. But when the Shadowhunters arrive, they find only blood and broken glass: Jace, the boy Clary loves, and Sebastain, the brother Clary hates, have disappeared.
The Clave's magic cannot locate either boy, but Jace cant stay away from Clary. When they meet again, Clary is horrified to discover the Lilith's magic has bound Jace with Sebastian, and Jace has become a servant of evil.
The Clave is out to eradicate Sebastian, but there is no way to harm one boy without destroying the other. Alec, Magnus, Simon, and Isabelle scheme and bargain to save Jace, but Clary is utterly alone, playing a dangerous game. If she loses, her life--- and Jace'S soul-- are forfeit. She'd do anything for Jace, but can she still trust him? Or is he truely lost?
