The Institute and The Clave go on high alert.
Jace suspects that Clary's memories are the key to locating Jocelyn and the Mortal Cup; Jace, Isabelle and Alec take Clary to face the Silent Brothers in the City of Bones; Simon attempts to adjust to his best friend's new life.
Alec authors a peace agreement in an effort to make amends with the Downworlders, while Jace and Clary are summoned by the Seelie Queen.
Clary, Jace, Alec and Isabelle work to rescue Simon from the vampire hideout, Hotel du Mort.
Alec and Clary are forced to make some hard decisions.