Its the start in a new island, You are a murderer one of the best, you got summoned by a leader of a near village to rescue the legendary immortal elixir, but for doing that you and other killers need to fight yourself until only 10 of you survive, at the end its only You, Gabimaru, Nurugai, Tamiya, Yuzuriha, Chobei and Rokurota. Your supervisor is Shion Yamada, while Gabimaru got Sagiri Yamada

Gabimaru: So we need to go? Sagiri: Yes Shion: Lets get going then