Clary and Simon familiarize themselves with the Institute and learn more about the Circle and the hidden world. Clary has visions and tries looking for Dot, who can get her memories back.
After getting a tip from Meliorn, Clary must venture into an alternate universe. But can she act fast enough before she loses herself in this new world?
After receiving information from an old ally, Clary, Jace and Luke devise a plan to find Jocelyn. Meanwhile, the Inquisitor arrives for Isabelle's trial.
Struggling with the revelation of their shared pasts, Jace and Clary avoid close contact while working with Magnus to track down warlock Ragnor Fell, who may hold the key to waking up the comatose Jocelyn.