Kotaro and the Shiratori siblings visit a guesthouse in Shinshu region. The guesthouse owner's wife, Osugi, had amnesia for the past two months from the shock of losing her only son to an illness. That night, the child of the monster, Flying Raidron, crashes onto Earth in the middle of the fireworks show. As Ultraman Taro attacks the monster, Osugi tells him...