Simon Lewis has been a human and a vampire, and now he is becoming a Shadowhunter. The events of City of Heavenly Fire left him stripped of his memories, and Simon isn't sure who he is anymore. So when the Shadowhunter Academy reopens, Simon throws himself into this new world of demon hunting, determined to find himself again. Whomever this new Simon might be. But the Academy is a Shadowhunter institution, which means it has some problems.