When Caitlin Flynn discovers a strange-looking man near a cave in the west of Ireland, her quiet summer holidays take a detour. She first suspects he's a vampire, but soon learns that his story is far more wondrous and unusual. He's on a quest to save his people from extinction - and he needs Caitlin's help But others are interested in thwarting the mysterious stranger's plans and gaining power for themselves. Can Caitlin and Fortescue find the Goddess Star and save the Source - and therefore all of Hamelyn?