The mysterious monster Neomegas appears suddenly in town, defeats several other monsters, and leaves. Vice-Captain Kaizaki tries to find out what's really going out, when she remembers the words of her mentor. The terrifying true meaning behind those words reveals itself before Kanata, the GUTS-Select team, and Ultraman Decker!

Finally! Finally!! GUTS-Select are given with new equipment in the form of a robot! It's name is the "TerraPhaser"!! Everyone is excited to meet the robot they'd been waiting for, but for some reason monsters appear every time they try to test a boot-up sequence!! As Ultraman Decker holds off the monsters, can the team safely start-up the TerraPhaser?!

The remaining cells of Neomegas are used to create Sphere Neomegas, and Ultraman Deckker and GUTS-Select struggle against it's overwhelming power. Kanata and the others are left powerless in this desperate situation, but pulling together all of their strengths around the TerraPhaser, their counter attack plan begins!