Daiko is an ordinary boy who admires the image of Ultraman in the TV show "Ultraman" and dreams of becoming a spaceship captain one day. He is still growing up and is currently just an ordinary civil servant in the Tourism Division of Yokohama City. Yes, the stage of this work is Yokohama, which has nothing to do with the previous Showa and Heisei series and exists in parallel in the real world. Asuka, who dreamed of becoming a professional baseball player when he was a child, is now a caddy at Yokohama Stadium. Arara is also a colleague of Asuka and continues to support him. Gamu, who has the ideal goal of "developing the spaceship that Daiko can fly in his dream", is currently working as an intern at the Yokohama MaliTime Museum with Atsuko. At the same time, Ultraman Mebius appears in Yokohama Port to catch up with King Gesla who has transcended time and space. He is the only guiding character who knows all this that has come to our world. "Let the seven heroes awaken again and defeat the invaders together" Who is the girl in red shoes who appeared in front of Mebius and said this? Along with the appearance of King Gesla, King Pondon also appeared at the Yamashita Pier. He was a powerful enemy who once defeated Ultraman Seven. Asuka, who works at Yokohama Stadium, Gamu, who works at Yokohama MaliTime Museum, and Daiko gathered together to talk about their childhood dreams and future plans. Let's look forward to the sparks that will be created with them in the future. Hayata, Dan, Go, and Hokuto are also ordinary humans. They have also married Akiko, Annu, Akiko, and Yuko respectively and have their own happy families. The strong monster Hilbagon that appeared in the 26th episode of "Ultraman Tiga" "Rainbow Monster Devil" and the super monster Goldras that appeared in the 36th episode "Smile Beyond Time and Space" have both been resurrected as King Hilbagon and King Goldras. Both monsters are related to time and space, so it is reasonable for them to appear in this world. In the conversation with Mirai, Daiko became more convinced of his goal. But when he heard about the "girl in red shoes" from Mirai, Daiko's once forgotten memory was awakened again. When he was still a child, he had seen the girl in red shoes. The mastermind behind the summoning of monsters to this world, the Hell Starman Super Hybrid, appeared. When he turned Mebius into a bronze statue and prepared to destroy it, an Ultraman he had never seen before appeared. His name was "Tiga"! Showa spaceman and Heisei Ultraman clash!