TegaSword dies?! The disaster that triggered the outbreak of the Universe War in the past. TegaSword was defeated by a Calamity remnant named Pestis. All it needs to revive is the ring that is the core of the stolen TegaSword. To retrieve the ring, the Gozyugers jump into the body of TegaSword, where Pestis is hiding and face many challenges! Will the five "outcasts" be able to unite and overcome the challenges? The shocking truth behind the birth of TegaSword is revealed for the first time?! Fight, Gozyuger! Revive the giant TegaSword! Protect the dreams and wishes of people!!

The Boonboomgers' run in the Big Bang Grand Prix is violently interrupted when the universe's top-ranked monster, Universe No. 1, appears and triggers a catastrophic universe fusion, causing parallel worlds to merge into one chaotic continuum. While Taiya Hando/Bun Red is suddenly transported to Planet Shaft, he's attacked by the Bitter Demon Beast Galaxy Circuit Guruma until Hoeru Tono/Gozyu Wolf arrives to back him up. Meanwhile on Earth, the remaining Gozyugers battle Universe No. 1. Bun Blue, Bun Pink, and Bun Black return to help, but the monster overwhelms them and defeats the combined teams. Hoeru then reappears in a dramatic new evolution: Saint Gozyu Wolf, declaring his vow to "stop the battle." With a slash that cuts through space itself, he sends all eight heroes hurtling into another dimension, setting the stage for the film's multiversal conflict.

In the past, a young Mashiro Kumade, aiming to be Number One, threw himself into the lonely "Ring Batle". One day, guided by a fortune teller, he arrives at a place where he meets "companions" who would drastically change his detiny. These are the Gozyugers who united to face the Calamity. Kumade, who had been a lone wolf, gradually found his heart filled with the bond he made for the first time ever. However, even in those peaceful days, the footsteps of the end approached moment by moment. What is the "true wish" that Kumade harbors in his heart at the end of his harsh fate?