近未来的东京，有着一个为了夺取“最强武器”而建立的两大组织，以开发最强兵器为目的的导示重工，和通过操控遗传因子来制造优秀人类的NSWF。他们的共同目的只有一个，就是得到那个拥有着最强威力、并且只有通过被选中的女人才能操纵的终极武器“WITCHBLADE”。地震灾害的6年之后……天羽雅音、梨穂子 ，两人幸福的生活着，但是，等待着她们的却是，WITCHBLADE那暗之力的召唤，以及异常残酷的命运……

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.