The Infernal Devices: Clockwork Angel

A sixteen-year old girl name Tessa Gray moves to London to visit her brother. She gets captured where her brother is supposed to meet her at the dock. She gets captured by the Dark Sisters who tell her she has special powers. The Sisters beat her and tire her out until she faints. One day a seventeen year-old boy named Will comes to save her. He takes her back to the Shadowhunters Institute. Shadowhunters hunt demons and Will thinks there is a possibility that Tessa could be a Shadowhunter. She falls in love with Will and Jem and doesn't know which boy she loves most. Tessa is also being hunted but she doesn't know who the person is that wants to kill her.