After killing an injured rabbit, young Daigo stops going to school and his older half-sister, librarian Kiriko, becomes his tutor. They live with the father, book-illustrator Kohei, but he does not care for Daigo. One day, Kiriko goes with Daigo to the movie theater to watch the 3-D film "The Shock Labyrinth", and Daigo catches a rabbit that comes out of the screen. Daigo soon has nightmares about a big rabbit, and one night Kiriko follows him and believes that his mother Kyoko is attacking him dressed in a rabbit costume.