October Younghallow is a terribly gifted shadowhunter, with a relatively normal life. But soon all of that changes when her mother turns against the Clave and October must fight her way through her pain and build an army of her own against her mother. Through it all, she finds love where she never thought she could find it, she finds friends when the person she thought would never leave her, does exactly that but most of all she finds out what she is capable of, and what can break her.