The War for the Death Instruments is over, and Clary Frey returns home to New York City. She is waiting for a lot of new, exciting: she learns to be a Shadowhunter, her mother marries her beloved, the Nephilim and the undead finally live in peace, and most importantly Clary can now be with Jace. But nothing is given for free .. Someone kills the Shadowhunters who once were in the Circle of Valentine, and throws corpses in the territory of the undead. Provocation threatens another bloody war. Meanwhile, Jace is starting to pull away from Clary out of nowhere. She is forced to solve the mystery, not even knowing that in the end she will face a terrible nightmare. Unaware of this, Clary launched a chain of events and as a result, she risks losing everything that is dear to her. And Jace too . Love. Death . Betrayal. Revenge. The stakes in Cassandra Clare’s new novel are higher than ever.