As mysterious murders threaten the new peace between Shadowhunters and Downworlders, only Simon, the Daylighter vampire, can help bring both groups together.

My whole world changed when I stepped inside the academy. Nothing is right about this place or the other students in it. Here I am, a mere mortal among gods... or monsters. I still can't decide which of these warring factions I belong to, if I belong at all. I only know the one thing that unites them is their hatred of me. Then there's Jaxon Vega. A vampire with deadly secrets who hasn't felt anything for a hundred years. But there's something about...

Zoey worries about her brother using Old Magick while he is in his world, so she and her friends travel to an alternative version of the House of Night, where dangers take the form of friends, and allies are found in the strangest places.