Twelve-year-old Andy discovers a mystery when his parents reveal his mom's past. He is heartbroken when he realizes she will die when he breaks the curse unless he intervenes. Andy returns to Oomaldee to find unicorns in the land and he and his company soon embark upon a quest to retrieve the horn of a unicorn. But a seductive voice calls to Andy, tempting him to surrender the unicorn horn in exchange for a promise to preserve his mom. Will he jeopardize his ability to end the curse to save her?