The Saeki family lived happily in suburban Tokyo, but housewife Kayako Saeki fell in love with her college professor, Peter Kirk, obsessively writing about him in her diary. Her husband Takeo discovered the diary. Believing that Kayako was having an affair, he became mentally disturbed and brutally murdered his wife. He then drowned his young son Toshio - who witnessed his mother's murder - in the bathtub, along with the pet cat, Mar. Takeo hid the bodies in the house before Toshio's ghost murdered him by hanging him. Peter came to the Saeki house to speak to Kayako after receiving a letter from her, only to find both her and Takeo's corpses, alongside Toshio's ghost. Shocked, he fled and killed himself the next day. The remainder of the Saeki family rose again as ghosts due to the curse, notably Kayako, who appears as an onryō ghost.