Billy Smith - the unlikeliest of heroes - and his friends, Lexi and Kurt, fell into Kiranok in book one and learned that Billy is in fact the goblin king, and they just might be the ones to save the day. Now, in The Fallen Star, the adventure heightens as Billy's leadership is put to the test, Lexi discovers the true extend of her powers, and Kurt find his place as he and Hop seek out what might be their only hope at victory.