Skandar Smith has only ever wanted to be a unicorn rider, and the time has finally come for him to take his Hatchery Exam, which will determine whether he is destined to hatch a unicorn egg. But when Skandar is stopped from taking the exam, and the mysterious and frightening Weaver steals the most powerful unicorn in the world, becoming a rider proves a lot more dangerous than he could ever have imagined. As he faces elemental magic, fierce sky battles, ancient secrets, nail-biting races and, of course, bloodthirsty unicorns, Skandar realizes he and his friends are in graver danger than he ever imagined.