The film opens up with a red orb of energy chasing after a blue orb of energy throughout space. Upon landing on a desert-like moon, the blue orb reveals itself to be the monster, Bemular. The red orb reveals itself to be Ultraman Mebius and the two face off. After a short battle, Ultraman Mebius destroys Bemular and returns to his home planet of the Land of Light (光の国 Hikari no Kuni?) in Nebula M78, where he is reunited with Ultraman, Zoffy, and Ultra Seven. The three ultras inform Mebius that "minus energy" has been plaguing several planets in the Universe lately, causing monsters across the universe to rampage for unexplained reasons.