Clary is abused by her father. Nobody knows, even her best friends Simon and Izzy. Simon's band, Cosmo Forte, just happens to have the two school bullies in it - Sebastian Verlac and Jace Herondale. Clary has a talent with music, but she will anything to hide it. When Simon breaks his arm, someone must take his place has guitarist in the upcoming competition...what will Clary do?