The threat that X had to throw into the sun, the cause of the Ultra Flares, Greeza, has finally appeared on Earth. Daichi and X discover Greeza is headed towards Xio HQ Japan in order to absorb the life energy of the Spark Dolls, and they unite in front of Asuna to stop him!
Space Cat Mu has come to earth, fleeing from mysterious energy strikes. Red King is coming, and is Wataru in love?
A TV show was held where reporters would record Xio's daily routine for 24 hours. At the same an alien criminal network surfaces and plots multiple kidnappings.
Captain Kamiki attends his daughter's wedding but at the same time, Gomess appeared and worse, the monster was charged with the Dark Thunder Energy.
Freed by Daichi and Xio, and joined by Hikaru Raido who had defeated the Spectre forces in the UPG world, Shou teaches Daichi some sword techniques to fight better. But will it be enough to stop the combined Guar army and the Spectre siblings in a combined form?
Gina Spectre is able to open up wormholes into other worlds, and through one brings a captured Shou and unknowingly UPG member Arisa (from Ultraman Ginga S). It's up to Daichi and the others to find Shou and stop Gina Spectre as she uses the Dark Thunder energy to her advantage.
When Gomora finally materializes from Xio's Cyber Monster experiments, but refuses to listen, Daichi becomes obsessed with figuring out why.
When a plant-like monster appears in a small village, Xio tries to heal its apparent malnutrition. But is the Monster as sick as their think it is?
Wataru's younger brother, Isamu, once dreamed of making it big as a rugby player. But he somehow ended up living in a sharehouse with a bunch of aliens!
While Xio members perform experiments to turn monsters into Spark Dolls, Alien Nackle appears and attacks the test site with Black King, while he takes the opportunity to steal the Spark Dolls. As he disappears into another dimension with the van, Rui unfortunately is stuck in the van, and contacts the team.To save Rui, X & Zero join forces.
Huge Giant Bird Birdon has emerged from the Mt. Okuma. Birdon set up a nest for its eggs but in the process traps several civilian captives in the pile. Angered by the attack as Xio tries to save the trapped people, Birdon rampages and Daichi as Ultraman X arrives on the scene but both soon succumb to the poison injected by the monster. At that time, Alien Fanton Guruman triggers a secret operation!?
Fifteen years after the incident, Xio officer Daichi Ozora was studying the Cyber Cards until the emergence of Demaaga attacking nearby citizens. At that time, an unknown voice was heard by Daichi, which came to Earth and fused with him, giving birth to the new warrior, Ultraman X.
A solar flare has awakened Spark Dolls from the depths of the earth and the ocean! Fifteen years later, Daichi Ozora transforms into Ultraman X to battle threats from both aliens and monsters. He is also a member of Xio, a team created to battle the monstrous threats.