The Mortal Instruments is about a girl who thinks she lives in the regular world. She could not be anymore wrong. Behind the world that we see, there is a world filled with demons and vampires and werewolves. The only people keeping these monsters in check are Shadowhunters. One day, Clary’s mother is attacked and her eyes are opened to this other world, where she meets a cocky and arrogant but very helpful boy named Jace. He joins her on her self appointed quest to save her mom, and subsequently, the race of shadowhunters.