Along with the case of the love-struck parabatai, there is a new matter at hand: the appearance of the new Shadowhunter, the long-lost Christopher Herondale. Christopher, or Kit, as he prefers to be called, is a sarcastic, rash boy - much like his cousin Jace. Although he doesn't want to accept it, his life is changing, his feelings are growing, and his heart is opening.