Following a brutal clash on Rakuyou, the mysterious history and true intentions of the immortal Naraku leader, Utsuro, come to light. By tainting the Altana reservoirs across various planets, Utsuro provokes the formidable Altana Liberation Army, the sworn enemy of the Tendoshuu. As Earth becomes the primary battleground in this cosmic conflict, Utsuro's sinister plan to annihilate the planet—and himself—approaches fruition. The assault on the O-Edo Central Terminal heralds the onset of the ultimate showdown to reclaim the samurai's land. Amidst the absence of the Yorozuya, the faltering bakufu, and the missing Shogun, the populace finds itself defenseless as the Liberation Army ravages Edo in the guise of liberation from the Tendoshuu's tyranny. Trapped amidst the clash of titanic forces, will Gintoki, Kagura, Shinpachi, and Shouyou Yoshida's former disciples set aside their conflicts and rally their allies to safeguard their cherished ideals?