Ayano, Miyu, Yuri and Mei are high school students. They learn about a fatal gas accident which occurred at a school in the past. The girls then experience unusual occurrences like hearing breathing from closed classrooms and seeing a person's shadow. Hitomi then sneaks into an abandoned school to shoot a horror video for the internet. Hitomi hears from her colleague Kimio about a fox's window which leads to the spirit world.
Four people are discovered brutally murdered in an up-scale high-rise apartment. All the victims appear to be family, but as the investigation deepens it is discovered that one of the victims isn't related to the family.
People from all walks of life (a high-school student, a middle-aged businessman, a yakuza chief, etc.) all receive mysterious messages from loved ones who were killed 3 months earlier in a shipwreck. They are instructed to go to a small island in the Inland Sea that evening. At the stroke of midnight, the lost ship emerges from the sea and they are given a brief time to say their final words to their lost loved ones, before the deceased must once again board the ship and it sinks back into the depths.
The Girls' Division of Okinawa Normal School and the First Okinawa Prefectural High School for Girls were also known as "Himeyuri no Gakuen". In July 1944, the students, who were supposed to spend their summer vacations at home, were called back to school to prepare for the coming war and to fulfill their duties as subjects of the Imperial State. The fate of the girls and teachers awaited them as the American army attacked.
The Kitao family is coping with the loss of the eldest daughter, Chizuko, who was killed in a freak accident the year prior. When the other daughter Mika is suddenly in a dangerous situation, Chizuko returns as a ghost to save her; reunited with her sister, Mika begins spending time with Chizuko again.
