A battle against the wicked Ultraman Belial almost results in the destruction of Earth. Years later, giant monsters begin to attack Japan, and the only salvation might be the heir of the greatest threat the universe has ever faced...
After Zero sacrifices his life to protect his friends, it's up to Riku to take on Galactron and protect the city.
The resemblance between Ultraman Geed and Belial has the public afraid of their new protector, making Riku question whether or not to use his new powers. Meanwhile, a mysterious woman with a sword is hot on the trail of marauding aliens.
The best lead on a new Little Star seems to be a comedian with healing powers. Who will get to him first: Riku, the AIB, or the mysterious force behind the fusion monsters?
Fukuide Kei, the enigmatic sci-fi author, invites Riku, Laiha, and the Igaguri family to a special lecture regarding his newest book. But things aren't what they seem, and it seems to spell trouble for Ultraman Zero.
