Following their rebellion against the bakufu, Gintoki and the Yorozuya are forced into hiding alongside Katsura and his Joui resistance fighters. Their uneasy peace is interrupted when Nobume Imai and members of the Kiheitai arrive with troubling news: the Harusame space pirates have betrayed both Kamui and Takasugi, leaving the latter missing after a devastating attack on his ship.
As Gintoki is drawn into the search for his former comrade, Nobume reveals disturbing information about the Tendoushuu, a mysterious organization secretly manipulating events from the shadows. Even more unsettling is the identity of its leader, Utsuro, whose appearance bears a striking resemblance to Gintoki's beloved former teacher.
Determined to uncover the truth, the Yorozuya and Katsura board Sakamoto's spacecraft and head toward Rakuyou, Kagura's home planet. There, rival factions gather amid growing hostility, bringing unresolved grudges and personal conflicts dangerously close to the breaking point.
With powerful enemies closing in and long-buried secrets beginning to surface, Rakuyou becomes the center of a fierce struggle where loyalty, family, and the fate of countless lives are put to the test.
