The film begins with several clips from past episodes of Ultraman X, ranging from the Ultra Flare to Xio’s final battle with Greeza. Back at the present, Guruman narrated a story about the original Ultraman’s fame in the galaxy and presented the Lab Team members a replica of the original Beta Capsule in hopes of calling the Ultra Warrior but instead, it triggered a chain reaction that set the whole lab in explosion. Xio members celebrated Daichi’s return from his monster observation in Australia, though the party was interrupted by deputy captain Sayuri, who chastised them for eating during the job. All of the sudden, they received an abnormal radio wave from the Baradhi Ruins located in Akita Prefecture, an ancient civilization area where a mysterious pyramid was discovered a long time ago. While arriving at the location, Daichi and Asuna bump into Tsukasa Tamaki and her son Yuuto, as well as Carlos Kurosaki, an adventurous celebrity who gains fame in the internet and tries to enter the pyramid as well. Entering the pyramid through a hole that Carlos busted, they discover a giant statue of Ultraman Tiga and a blue stone.