After an intense fight against Kamen Rider Ikazuchi, A.I.M.S. discovers that the hideout of MetsubouJinrai.net is located somewhere near Daybreak Town, and they proceed to carry out an operation in the area! With the awakening of the Ark, the powers of the MetsubouJinrai.net terrorists have increased significantly, as they engage A.I.M.S. operatives in battle! Meanwhile, Aruto visits his family grave alongside the Astronaut-Type Humagear who had just lost his elder brother, Raiden. Aruto starts to think about the Humagear's ability to have a dying wish as he is standing before these graves. Aruto receives an incoming report regarding the activities of MetsubouJinrai.net, which means that the final confrontation between humans and Humagears is about to begin!
仮面ライダー雷との戦いの末、滅亡迅雷.netのアジトがデイブレイクタウン付近にあることを突き止めたA.I.M.S.は、ついに掃討作戦を実行する。アークの知能が目醒めたことで、今まで以上の力を手に入れた滅亡迅雷もまた、真っ向からA.I.M.S.との戦いに立ち向かう。そんな中、或人は雷電という兄貴的な存在を失った宇宙飛行士型ヒューマギアの昴を連れて、飛電家のお墓を訪れていた。ヒューマギアであり父親代わりの其雄の一部も眠っているそのお墓の前で、ヒューマギアの遺志に想いをはせる或人。そんな或人のもとに“滅亡迅雷.net掃討作戦”開始の一報が入る。それは、人間VSヒューマギアの最終決戦の幕開けを意味していた。
