Clary, Jace, Alec and Isabelle work to rescue Simon from the vampire hideout, Hotel du Mort.
After getting a clue about who may have wiped Clary's memories, the crew hunts down the High Warlock of Brooklyn, Magnus Bane. With all the warlocks in hiding from Valentine, the team lures Magnus out with an offer he can't refuse--a killer party and something very valuable.
Realizing that the Mortal Cup is hidden inside the drawing on Dot's Tarot cards, Clary and Jace break into Luke's precinct where they are hidden.
With word of Alec, Jace and Isabelle's activities with Clary reaching The Clave, a convoy is sent to observe the Lightwoods running the New York Institute. Once The Clave representative arrives, it is clear how much trouble the Lightwoods are in.
Everyone at The Institute prepares for the wedding of Alec and Lydia. During what should be a time of great celebration for many is far from it as they examine their relationships. Alec's parabatai should be at his side for the event, yet he and Jace are still at odds.
