Untuk menyelamatkan ibunya, Clary harus pergi ke Kota Kaca, kota leluhur Pemburu Bayangan. Tapi dia memasukinya tanpa izin, yang berarti melanggar Hukum dan terancam dihukum mati. Lebih parah lagi, Simon dipenjara selama dia tidak mau bersaksi mengambinghitamkan keluarga Lightwood. Ketika ternyata Jace tidak menginginkan Clary di sana, Sebastian yang misterius membantu Clary menyingkap rahasia …
Clary Fray just wishes that her life would go back to normal. But what's normal when you're a demon-slaying Shadowhunter, your mother is in a magically induced coma, and you can suddenly see Downworlders like werewolves, vampires, and faeries? If Clary left the world of the Shadowhunters behind, it would mean more time with her best friend, Simon, who's becoming more than a friend. But the Shad…