Xuanwu World is a world where humans and monsters coexist. The only human beings who can fight against demons are demon slayers. The demon slayers have their own organization called the Demon Slayer Alliance. Lin Yi is a demon slayer at the bottom of the demon slayer alliance. However, he discovered a big secret of the Demon Slayer Alliance. Therefore, the top leaders of the Demon Slayer Alliance want to get rid of him. In order to survive, Lin Yi had to swing the big sword in his hand, which was originally used to fight the monsters, towards his compatriots.
