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Unable to support his sick family as a samurai in the modern Meiji period, Shujiro enters a dangerous tournament that promises a huge cash prize.

Kyojin, a former ninja, proposes an alliance with Shujiro and Futaba. Meanwhile, a high-ranking government official fears a potential samurai uprising.

The organizers bet on which contestant will reach the next checkpoint first. Shujiro shares his past with Futaba, then reunites with his estranged sister.

The group tracks the disposal of bodies in a plan to uncover the organizer of Kodoku. There, Shujiro confronts Sakura, a former comrade from Satsuma.

As the true purpose of Kodoku unravels, Shujiro sends a telegram to warn Okubo about the brewing conspiracy and arranges for Futaba's safety.

As the ruthless Gentosai finally corners Iroha, Shujiro faces Bukotsu in a fierce final showdown. Meanwhile, Okubo closes in on the game's mastermind.