The title is a play on words. In Japanese, depending on which kanji is used, "shikoku" can mean "four countries" (which is the name of the island where the movie is set) or it can mean "land of the dead". The tagline used for the film was "Some things are better left dead...", with the genre of the film fitting into Horror/Thriller.
Years after moving to Tokyo with her parents, Hinako returns to her hometown in rural Shikoku. She soon learns that her childhood friend, Sayori, died several years ago and that Sayori's mother, who used to perform seances and exorcisms, has gone almost insane with grief. After seeing Sayori's yūrei several times during the night, Hinako consults with some local experts on the paranormal and discovers that Sayori's mother has something planned for her daughter.
- Yui Natsukawa as Hinako Myoujin
- Michitaka Tsutsui as Fumiya Akizawa
- Chiaki Kuriyama as Sayori Hiura
- Toshie Negishi as Teruko Hiura (Sayori's mother)
- Ren Osugi as Yasutaka Hiura (Sayori's father)
- Makoto Satô as Sendo
- Taro Suwa as Oda
- Tomoko Otakara as Yukari Asakawa
- Haduki Kôzu as Chizuko Oono