The Mortal Instruments: City of Bones

In New York City, Clary Fray, a seemingly atypical teenager, learns that she is descended from a line of Shadowhunters — half-angel warriors who shield humanity from evil forces. After her mom disappears, Clary joins forces with a bunch of Shadowhunters and enters Downworld, an alternate realm crammed with demons, vampires, and a number of different creatures. Clary and her companions should discover and shield an historical cup that holds the important thing to her mom’s future.