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.

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.

While investigating the horrifying death of her boyfriend, Mai Takano learns about a videotape haunted by the spirit of a disturbing girl named Sadako, which kills anyone who watches it exactly one week later. When her boyfriend’s son, Yoichi, starts to develop the same psychic abilities as Sadako, Takano must find a way to keep the boy and herself from becoming the next victims.

A young pathologist seeks answers to the mysterious death of a friend and soon comes into contact with the same cursed videotape that caused the death of the friend's wife and son, which is haunted by the curse of Sadako, a relentless spirit.

A girl, Yūri Kurahashi, after watching a cursed videotape together with her friend in a haunted house, becomes trapped in a conflict between the two murderous ghosts: Sadako Yamamura and Kayako Saeki

A psychologist connects her missing brother to the strange case of a mysterious little girl believed to be Sadako reincarnated.

Akane is a high school teacher who hears a rumor from her students that there is actual footage on the Internet of someone's suicide. The footage is said to drive anyone who sees it to also commit suicide. Akane does not believe the rumor at first, but when one of her female students dies after viewing the footage, she and her boyfriend Takanori are fatefully drawn into the horror that has been created by the man who appears in the suicide footage, Kashiwada. Kashiwada's intention is to create chaos in the world by bringing back Sadako and the power of her curse. Now Akane has to fight against Sadako and Kashiwada to save the lives of herself and Takanori.

Five years have passed since the events of Sadako 3D. Akane is pregnant with a child with her boyfriend Takenori. However, Akane dies after giving birth to her daughter. When Takenori's sister Fuko takes up the task of caring for Akane's daughter, the infamous cursed video resurfaces. During her investigation, Fuko learns about the legend of Sadako's daughter...

Ayaka Ichijo is a graduate student with an IQ of 200 who tries to investigate the strange deaths happening nationwide after people supposedly watched a cursed video and her younger sister also did the same out of curiosity.