Chikagura Chima is a fifth-grader attending a boarding school. During her summer vacation, she finds a beautiful doll in the storage room of her family home. That night, she has a nightmare that leaves her unable to move her legs. Suddenly, her childhood friend, Ryu, a boy who can see curses, appears before her. He tells her that she is cursed by the doll. Immediately afterward, the two are dragged into the "Hidden World," a realm of ghosts !?