On her 16th birthday, self-reliant Diana is dragged from London to Edinburgh. Her occult-obsessed father is investigating a spooky murder in the city. She is used to trailing in his wake, but this time things are different. An encounter with an enigmatic young man, a disturbing message left in her bedroom . . . and her dad taken hostage by a demon. To top it all, her two new friends inform her she's a Demon Hunter. Can life get any weirder? Will Diana rescue her dad, learn how to defeat enemies she never knew she had, and come to terms with her new destiny? Turning sixteen just turned deadly.