The "splatter gun action" manga takes place in a world where humans no longer die. Even if they are stabbed or shot, humans revive within a few seconds. However, a new illness called RDS is suddenly spreading that deprives humans of the revival ability. No one knows whether RDS is a conspiracy, a part of natural selection, or something else. Kenzaki, who lost his precious sister, is chasing the mystery of RDS, when he meets a lone girl.