Mitsuo Ando is a a high school teacher who lost his child son Takanori a year prior, drowned at the beach. His wife had a nervous breakdown and is in a mental facility, having no recollection of the tragedy and believing their son is still alive. A former student of his is the only survivor of a mysterious mass killing in an office building -- all of her colleagues died of heart attacks at the same time. She has no memory of the event and is prime suspect by the police. Ando joins forces with a friend of hers and also his ex-student, currently working at the Scientific Police, to prove her innocence. They discover a CD-Rom in the office which might have caused the deaths, and presumably has a digital version of the cursed tape by Sadako Yamamura, whose viewer would die after watching it in 13 days. Meanwhile, Mai Katano is warned by the late Ryuji Takayama that Sadako is trying to be reborn. She is able to sense the late psychic's presence and helps Ando in their investigations. Sequel to the TV series "Ring: Final Chapter".