二大怪獣東京を襲撃

A rock-like object was found in a construction site. While Go and K Kishida were arguing about how to deal with it, Underground Monster Gudo appeared in the quarry. On the other hand, Ancient Monster Twintail came came out of the rock-like object, bringing panic to Tokyo's Shinjuku, the subcenter of Tokyo. Go transforms into Ultraman to fight Twintail, until Gudon came as well.

Hideki and Kishida are called in to investigate an ancient egg fossil on a construction site. Hideki senses something strange about it, but Kishida decides to burn it with his MAT Shoot instead. Soon after, the monster Gudon emerges on a mountain and begins to rampage. Hideki and Kishida hurry to the site, however Hideki hesitates allowing the monster to escape.