Set in a post-apocalyptic Japan in year 4026, humanity's only hope lies with Emma, an outcast shunned from society for her affliction, and Koo, the blighted dog. "The blight" has spread throughout the country, transforming all living things into "malefacts." Emma, the protagonist shunned as a "blighted," sets out on a journey alongside a malefact named Koo. Together, Emma and Koo embark on a journey toward the Far West to defeat the "Beast of Reincarnation," the root cause of the blight. In a world eroded by the blight, formidable enemies and the Blighted Forests threaten Emma and Koo. The combat experience fuses Emma's real-time action with Koo’s command-based strategy. By defeating massive foes, Emma and Koo awaken their latent abilities and master various styles of combat techniques. What awaits the girl and her companion at the end of their journey?