The Mortal Instruments: City of Bones

In New York City, Clary Fray, played by Lily Collins, discovers she is a descendant of Shadowhunters — half-angel warriors who protect humanity from evil forces. After her mother disappears, Clary joins forces with Jace Wayland, a Shadowhunter, and enters Downworld, an alternate realm filled with demons, vampires, and other creatures. Clary and her companions must find and protect an ancient cup that holds the key to her mother's future.