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.

Beliarok, the Phantasmic Magic Sword, is bored and bothers Z with its childish behavior. Ediom, unable to stand this sight, proposes examining data on other Ultra Heroes' weapons.