With everything that Simon has gone through this past year, a family dinner for Yom Kippur - the Jewish Day of Atonement - poses as a real challenge. How can he come clean about being a vampire and especially about what just happened to his family? And if he is stressed out, what if he can't control his vampire urges? Looking to take care of this himself, Maia insists on helping him out whether he likes it or not. Meanwhile, Clary and Jace go on an unsanctioned mission and test out their newfound rune powers.
18 year old Clary Fray, finds out on her birthday that she is not who she thinks she is, but rather comes from a long line of Shadowhunters - human-angel hybrids who hunt down demons.
When her mother Jocelyn is kidnapped, Clary is thrown into the world of demon hunting with mysterious Shadowhunter Jace and her best friend, Simon. Now living among faeries, warlocks, vampires and werewolves, Clary begins a journey of self-discovery as she learns more about her past and what her future may hold.