Ultraman X

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.

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!?

Daichi and Asuna were sent on surveying a suburban area after a series of earthquakes reported. While patrolling, Daichi came across a mysterious woman. In addition, she appears every time the underground monster Telesdon emerges. While Telesdon retreated after being attacked with flares, Daichi and Asuna are task to discover the mysterious woman's identity. Said woman resembles an unknown civilian in real life, whom died sometime prior.

Alien Zarab had planned for destruction by making Bemstar attack the city. Asuna thinks that Daichi had got caught up in this attack and has died. Her panicked attack had also caused Ultraman X to be stuck inside Bemstar's body. Also, Wataru and Hayato were following Zarab but because of their rivalry they lost him. Captain Shotaro had told them that Team Work is important. Asuna and other Xio Members decided to unite and rescue Ultraman X.

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.

A man named tE-rU appears in the city & makes trouble to others. Is he an alien? He came to earth by controlling & riding an Mecha Monster called Rudian. tE-rU heals an girl who was injured. By seeing this Daichi Oozora realizes that this person has no evil intention. He Unites with Ultraman X to stop the movement of Rudian. Xio were protecting tE-rU & Rudian & when Xio were knowing about those two, they learn a fearful truth. A Monster named Gargorgon was aiming at Rudian & he will land on earth very soon.