Godzilla, Anguirus, Manda and Rodan go straight to Canada, but on the way a giant turtle intervenes, almost as tall as Godzilla himself, was Gamera! Gamera was seen by Spiega a few days ago, and he came to alert the earthlings kaijus about the space kaijus. Godzilla ignores the turtle. Gamera gets angry, and throws a fireball to Godzilla in the back; Godzilla gets angry, and the two start fighting. Gamera was as strong as Godzilla, and was even able to launch it towards a gigantic rock. The rock fell on the head of Godzilla, but does not suffer any damage, because his head is as hard as Everest, and hits his tail with Gamera, but stops him, and Godzilla kicks him, sent back only 40m away from the point where Godzilla is. Gamera hides her legs and transforms her arms into wings, and flies to Godzilla, grabbed and raised to the Stratosphere, and drops it. Godzilla fell like a chopped missile, happy to have felt something as exciting as falling from a height higher than 15km, and falls, producing a huge explosion of earth. The others observe impacted, thinking that their friend would not survive. Gamera descends slowly, satisfied to see Godzilla biting the dust, and apparently being dead. But ... Godzilla gets up, this is because now it is harder than it was in 2015.

Gamera is impressed, and bows before the king of monsters. Godzilla needs Gamera's help now, and Gamera accepts to confront the great threat that space kaijus claim. The five go to Canada, prepared to face Black King, but, the monster had a broken neck, and on earth said something "Give up hope to survive or fight, EVERYONE WILL DIE". Gamera realizes that the space kaijus have already arrived on earth, and that they are exterminating all the creatures they encounter. Godzilla says they have to hurry, and they have to avoid the end of the world.

But, five kaijus would not be enough. Godzilla knows who to look for; Rethar and Nautilus. They go to Odo island, where Rethar and Nautilus were sleeping next to another kaiju, Spiega. Godzilla wakes them up, and asks, if they want to help save the world. They accept, and follow all the other kaijus. In Manhattan, Zilla was swimming towards the Galapagos Islands. There, Zilla finds a lot of Tuna, but, something stalked there, was Oodako, who was feeding on clams. Zilla protects her food, and destroys the poor giant octopus. Zilla leaves the islands, looking for a bigger prey. Godzilla and his team are on the shores of New York, and Zilla sees them, confusing them with a herd of whales. Godzilla smells something, and sees an opponent, Zilla. Godzilla submerges, and attacks Zilla from below, and throws a portion of the Atomic Breath, leaving him sedated. Godzilla and the others are carrying it.

Zilla wakes up, and Godzilla explains what happened, and Zilla understands, and joins the team. While they were getting ready, the other monsters were being defeated by the space Kaijus, not being such a big problem for the aliens. The others gathered Titanosaurus and Arstron, which undoubtedly united, forming a kind of resistance. The final battle happens in Osaka, where the space kaijus were waiting for the terrestrials. The battle had begun, Godzilla was going for Ghidorah, while the others fight with SpaceGodzilla and Gigan. Godzilla started to push Ghidorah, but Ghidorah grabs him with his tails, and drags him to the Tsūtenkaku, where the building collapses on top of the kaiju. The others were slowly being defeated, while Godzilla resisted against Ghidorah. In the end, the terrestrials fell, and only Godzilla remained. At first, Godzillalos was being beaten, thrown, subdued and was being defeated, but, Gamera stood up, only to help Godzilla, who was about to surrender. Gamera pushes them, and the three fall. Godzilla started with Gigan, bursts his head with the Atomic Breath, then by SpaceGodzilla, breaking his crystal shoulders, his weak point, and which in a few hours would cause his death. And to finish with Ghidorah, Godzilla launches his Spiral Breath, and Gamera throws his Breath of Fire, which raise Ghidorah, sent her into the Atmosphere, and the two powers pierce her breast, killing him.

The others recover, and everyone goes to Odo island, their new home. What the kaijus expect now, is that nothing else happens after this, but it is possible that it does happen.