14-year-old Jack Snow is late for practice when Calliope and Phineas Wing cross his path. Jack realizes helping them means he won't make it to practice, but he cannot imagine how far from home he will end up as a result. When a mysterious force draws him through a crack in reality, leaving his two new acquaintances behind, Jack, Phineas, and Calliope must all make their way home amongst strangers.
