Gintama.

Gintoki, Kagura and Shinpachi have joined the resistance against the shogunate and are forced into hiding with Katsura's Joui rebels. Their next move comes from an unlikely alliance: Nobume Imai and members of the Kiheitai reveal that the Harusame pirates have turned on Kamui and that Shinsuke Takasugi disappeared after an ambush.

The trail leads the Yorozuya, Katsura and Sakamoto to Rakuyou, Kagura's devastated home planet. There, old grudges between the Yato, fractured rebel factions and the shadow of the Tendoushuu converge around Utsuro, the immortal figure whose face echoes Gintoki's lost teacher. The battle for Rakuyou becomes inseparable from the past each of them has tried to outrun.