Ai is a 12-year old girl who inherited her departed mother's job of “Grave Keeper,” whose work is to grant peace to the dead who cannot die. She lived a quiet life with her kind adoptive parents and the other villagers, but one day, a young boy calling himself “Hampnie Hambert”, a man-eating toy, appeared in the village with a gun in his hands, forcing Ai to witness how cruel reality can be…