The world has been abandoned by God. As a result, neither life nor death can end, and the "dead" wander restlessly among the living. God created "gravekeepers," supernatural entities capable of laying the dead to rest via appropriate burial, as one last miracle before turning away forever. In lieu of her late mother, Ai, a cheery yet naive little girl, works as her village's gravekeeper. One day, a guy named Hampnie Hambart, who claims to be Ai's father, appears and kills everyone in her hamlet. Ai chooses to join the mystery man on his travels after losing her community and having no plans for the future. The youthful gravekeeper attempts to complete her duty as she wanders the nation, bringing calm.