Following the battle with Demaaga, Gento can not hide his confusion about the alien being that resides in his own body. That's when a meteorite flies in from outer space. It lands on Earth, evading the GGF's attempts to intercept it, and transforms into the kaiju Gebalga. It seemed that Earth Garon would have the upper hand in the fight until Gebalga revealed it's surprising ability...

As the network contamination by Gebalga continues to spread, SKaRD plans a new operation. Gento is distrustful of Blazar, who has once again acted against his will in the battle against Gebalga. He decides to leave the Blazar Stone in his locker. SKaRD decides to commence a major joint-operation by combining forces with the development team and the special forces unit.

SKaRD is forced to deal with the appearance of kaiju around the world. Gento transforms into Blazar to fight them off as well, but the battles are taking a severe toll on his body. Earth Garon is dispatched to deal with Taganular's emergence in Koarai. However, at the same time, Taganular also appears in Nevada, US. Blazar is left with no choice, but to head down to fight it. However, that's when he discovers Taganular's surprising ecology.

Varallon reaches the moon, dropping bombs one after another. If this persists, it will alter the moon's orbit, leading to catastrophic consequences for Earth. Command directs SKaRD to deploy to the moon in the Earth Garon Mod.4 to eliminate Varallon. A desperate space battle unfolds.

Blazar and SKaRD face defeat in their battle against Varallon on the moon. Meanwhile, Emi is captured by Dobashi. In a dire turn of events, Varallon descends to Earth. Adding to the mystery, there's an appearance of a mysterious fleet of messengers. What will be the fate of SKaRD and Earth Garon's battle? What truth does Emi discover? Will Gento and Blazar be able to protect Earth?