Kaoru’s baseball team is in need of a miracle. They’re facing a rematch with a tough group of sixth graders, and if they don’t win this time, then they’ll forfeit their right to the practice field. Luckily, teammate Yohko’s crystal ball shows them that their savoir lives in the mountains that surround their town. When Kaoru makes the journey to the mountains, he discovers a young ninja named Kyuma, who lives alone and trains with his ninja dog, Inui. With Kyuma’s skills, the team might have a chance to win, but only if Kaoru can teach Kyuma the basics of baseball, and fast!