A mysterious video has been linked to a number of deaths, and when an inquisitive journalist finds the tape and views it herself, she sets in motion a chain of events that puts her own life in danger.

Dr. Hattori and her husband watch footage of brain surgery experiments with Manchurian, Russian and Japanese guinea pigs that had been found in the basement of a wrecked hospital. Out of the blue, there is a white light and when they look back, they see they children Ota Miyuki and Kaori staring at the light. Years later, Miyuki vanishes from the Tama Medical University Hospital and her sister Kaori, Miyuki's boyfriend Motojima and detective Hirasawa are seeking her. However, Miyuki and the teenagers Kazochi, Takumi, Hattori and Rieko have been submitted to a nightmarish experiment by Dr. Hattori and her team with tragic results.

Taking place thirty years before the events of Ringu, Ringu 0 provides the shocking background story of how the girl on the video became a deadly, vengeful spirit.

Miyuki Asakawa tells her colleague Etsuko Yamagiwa that she has a ghost in her home. When Etsuko goes to Miyuki's home, there is only Miyuki's father there. Etsuko becomes worried about Miyuki's state of mind, and she takes Miyuki to the psychiatric hospital where her husband, Tatsuo, works. There, Miyuki receives a diagnosis that she lacks the concept of "family." Later, Etsuko tells Tatsuo that she is not comfortable with Dr. Jirō Makabe. Tatsuo introduced her to Dr. Makabe earlier at the hospital. Etsuko has a feeling of unease about her husband working with Dr. Makabe. One day, Etsuko hears Dr. Makabe state "I came to Earth to invade."

Satomi breaks her lover Takao out of jail, who was falsely accused of killing her parents.

Dr. Hattori and her husband watch footage of brain surgery experiments with Manchurian, Russian and Japanese guinea pigs that had been found in the basement of a wrecked hospital. Out of the blue, there is a white light and when they look back, they see they children Ota Miyuki and Kaori staring at the light. Years later, Miyuki vanishes from the Tama Medical University Hospital and her sister Kaori, Miyuki's boyfriend Motojima and detective Hirasawa are seeking her. However, Miyuki and the teenagers Kazochi, Takumi, Hattori and Rieko have been submitted to a nightmarish experiment by Dr. Hattori and her team with tragic results.

With the help of a mysterious acquaintance, a former low-level yakuza tracks down and kidnaps the man he believes kidnapped and murdered his daughter, but others are soon implicated in the death.

The story of Orochi revolves around the life of the Monzen family. Aoi Monzen, a famous, but aging, movie star and Kazusa and Lisa Monzen her two daughters. Aoi hopes for them both to take over her legacy as a star, but Kazusa does not live up to her expectations. The mother is always pitting the girls against one another competitively. As a result, as the years pass, the love the sisters shared grows to a hidden hatred. When another girl named Orochi saves the girl's mother from a terrible accident a bizarre chain of events is set in motion spanning many years. The atmosphere in their estate builds up until Orochi reveals a terrible truth that the family must keep hidden from the world. Orochi serves as the narrator of the story. The movie is based on a Kazuo Umezu manga series which ran from 1969 to 1970.

Bad things happen when innocent blood is shed. In the early 1700s, Lord Sodom Ichibei is happily celebrating his wedding day when his wife-to-be suddenly dies. In his search for an explanation, he kills any and every suspect he comes across. When Lord Ichibei tortures and kills two innocent girls, their death brings about a curse on the Sodom family. Three hundred years later, one of Sodom's descendents, Ichiro, is also set to be married. But one of the innocent victims has been reincarnated as Ichiro's sister and she kills everyone at the wedding. This transforms Ichiro into the evil and vengeful "Sodom The Killer", a cursed man hell-bent on slaughter and the world's destruction...