Urutoramantarō wa, uchū kaijū Mururoa ga hikiokoshita yami no kumo kara chikyū o sukuu hōhō o mitsukeru tame ni,-kō no kuni e to tabidatsu.
Ultraman Taro journeys to the Land of the Light to find some way to relieve the Earth from the cloud of Darkness that the space monster Mururoa has caused.