There's no such thing as magic and monsters. Or so Harper once thought. After a fateful night before her junior year, strange shadows and mysterious noises seem to be everywhere. When her boyfriend is brutally murdered, the police write it off as a freak accident, deciding her "strange" testimony is given under duress. She knows whatever got to Gavin wasn't human, and she refuses to stop looking until she finds his killer, even if it proves once and for all that there are monsters living among us. With the discovery that ghosts, mothmen, witches, vampires and all supernatural beings are real, Harper finds herself amidst a complex bundle of unseen heroes who call themselves "Keepers, " sworn to protect the secrets of the paranormal creatures that walk this earth. As she tries to understand what's so special about her that she's able to break an old Keeper law and attend Guardare Academy, Harper has a baffling vision of kissing a mysterious guy before a blade is brought down on him. Before she can get a handle on her future, she becomes central to a battle between the questionable "heroes" and the evil she's been training to fight, leaving her to wonder if there's any way to change the fate that has been foretold before it's too late.