Uchūbito no oni wa, urutoramantarō o shōnen ni tabe saseyou to iu jaakuna keikaku o tatete iru. Sono keikaku ni wa, Kōtarō o chīsaku shite, kare to shōnen no otōto o mame no naka ni ireru to iu naiyō ga fukuma rete iru.
An alien ogre has a diabolical plan to get a little boy to eat Ultraman Taro, which somehow involves shrinking Kotaro and placing him and the little boy's brother inside a bean.