Clary Clearwater is a regular high school freshman. She's a good, innocent girl, but some people just don't trust her, especially her teacher, Mr. Aguilar. But one day she met a boy online, who turned out to be someone she never thought he would be. She meets the rest of his family but then The Observer takes them away from her including her best friend. She will do anything to get them back, including to sacrifice herself to The Observer. What will she do?