With word of Alec, Jace and Isabelle’s “extracurricular 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 very clear how much trouble the Lightwoods are in.

Meanwhile, Clary is faced with a devastating decision.

To help get answers to what Valentine may be planning, Isabelle and Clary are sent on a mission to visit the Iron Sisters. Once there, more truths may be revealed than Izzy and Clary planned. On a mission of their own, Simon and Maia are determined to find Luke who is still missing after the demon attack at the Institute. Meanwhile, Magnus and Alec finally go on their first date.