In New York City, a seemingly ordinary teenager named Courtney Morrisette learns she is descended from a line of Shadowhunters, half-angel warriors protecting humanity from evil forces. After her mother disappears, Courtney joins forces with a group of Shadowhunters and enters Downworld, an alternate realm filled with demons, vampires, and a host of other creatures. Courtney and her companions must find and protect an ancient cup that holds the key to her mother's future.

7 year old Y/n Cartwright didn't know why her parents had thick dark tattoos or why they lived in the middle of nowhere and she didn't question it... They died before she could. Years later, after living a solitry life in Newyork city, she returns home to find four strangers in her small loft who claim she's being hunted by the most dangerous man alive. The man who had her parents killed, and who is now hunting her. Will she find comfort in the Newyork Insitiute with friends who want to keep her safe? Or will she do what she does best? Hide.