Clary is pregnant with Jace's baby but Jace has other plains with another girl. Clary runs away after catching Jace cheating on her. she ends up at the L.A. Institute where she meets her new family all the Blackthorn children, Victoria Bloodrose and her brother Carter. She has a chance to start over a new life. She is force back to New York when Sebastian returns.

Clary is both amused and annoyed by Jace, who acts oblivious to the fact. She puts up with him all year at school, and summer is her only reprive. So when she and her friends go to her family's summer house in Idris, she is horrified. After a few weeks there, she slowly begins to realize that there may be more to the house and to the antagonizing Jace Wayland than is let on.

Clary suffers through Idris High School with her cousins Nate and Tessa. Trying to keep and eye on Tessa and out of the eye of the golden bad boy Jace. As for Tessa, she deals with evil girls, pervy seniors and a certain blue-eyed babe...TMI TID heart