Bucchigire!

The Shinsengumi's Eighth Division, a law-enforcing squad in Kyoto, remains faithful to the shogunate. But they are nearly annihilated after a ruthless attack from an imperialist criminal gang called the Masked Demons. Heisuke Toudou, the sole survivor, is critically injured. Urged to rebuild the Shinsengumi by the local feudal lord, Katamori Matsudaira, Toudou offers eight convicts the chance to redeem themselves. They must abandon their old names and become substitutes for the eight Shinsengumi captains.

One of them refuses and is immediately executed by the former assassin Sakuya. Toudou struggles to turn the seven reformed criminals into loyal servants. Ichibanboshi, whose family was killed by the Masked Demons, is impulsive and vengeful, creating an obstacle to Toudou's strategy. Other factions, like Kogorou Katsura's group, plan to seize power at the end of the Edo period. As Toudou pledges to protect the shogunate against imperialists and foreign invaders, the battle for power has just begun.