Jace tries to keep Clary for going to Idris the plan goes wrong and Simon ends up making the trip instead. When Clary learns that they have left without her she overreacts and puts herself and Luke in danger. Clary arrives and hunts down the person that will help her wake up her mother.She learns more about her mother that she had ever planned to. The Clave is in an uproar about Valentines latest activities. Valentine has declared war and Clary has to make herself known in order to stop him. Even after learning that they are brother and sister Clary and Jace continue to struggle with the boundaries of their relationship.