Beliarok, the phantasmic magic sword, suddenly appears before Ediom and Ultraman Z on Planet Ialim . With its arrival, Ediom learns how the sentient sword came to be. Earth was facing a desperate crisis. What a terrifying tale.

Ediom had heard about Ultraman Trigger from Ignis. Seven years later, a new hero inherits the light Trigger had nurtured. His name is Ultraman Decker. When Trigger and Decker assemble, it is to stand against a great peril.