Monster X left Gigan, SpaceGodzilla and King Ghidorah in a coma, while they recovered. With his huge army, he descended towards the earth, landing in China. He knew that something was going to happen, but he did not expect it that way; the ground began to tremble, and broke, freeing an entity that woke up after millions of years ... An entity, which was considered a god... Bagan. Monster X saw the creature in amazement, thinking that if he faced it, he would fall defeated.
The creature began to move, heading towards the army. Bagan asked "Zhè shì nǎ yī nián? (What year is this?)" And Monster X responds "Wǒmen shì zài 2019 nián (We are in 2019)". Bagan asked him "Nǐ zhīdào Gē sī lā shì shuí ma (You know Godzilla?)" To which Monster X replied "Wǒ lìkè dǎbàile tā (I defeated him a moment ago, appearance)".
It turns out that the Godzilla race has lived millions of years ago, just like Bagan, and a Godzilla could defeat him.
Bagan takes control of the entire army, and now it is in his power. Desperate Monster X tries to hit Bagan, but with his tail sends him flying to Korea. Bagan is now thinking about Governing the planet, and destroying the only Godzilla he knows... the one of today.
Meanwhile, Godzilla decides to face the Monster X, with the help of some Kaijus who recovered; Zilla, Gamera, Spiega, Rethar, Nautilus and Anguirus. Bagan ordered his army to destroy all the Kaijus that live, and also destroy everything they find on planet Earth. All the space kaijus were divided into groups and went to different places.
Bagan remembers the hatred he had when he was defeated by the Godzilla millions of years ago, and he wanted Godzilla to become extinct.
As for the land Kaijus, they continued touring the ocean to reach the coast of China, where they would meet Monster X. Godzilla picks him up and grabs him by the neck, but Monster X says in his language "You do not understand, because I can not fight, I'm angry with that Bagan! " Godzilla tells him "What are you talking about?", And Monster X says "Of the god incarnate!".
Godzilla leaves him, and begins to think. Godzilla now understands everything; He is the reason why Bagan is here, and he has to solve this.
Godzilla asks him: "Where is that Bagan?"