What are the details of The Grudge 1? can't read!

"The Grudge 1" tells a story about resentment. The story begins with volunteer Rika. You may find it confusing when you read it, but you can understand it after you read it a few times and sort out the development of the story.

Rika came to Tokunaga's house to take care of the lonely and demented old man Yukieda's mother-in-law. Her mother-in-law originally had a son, daughter-in-law, and daughter. Unfortunately, Tokunaga Katsuya's family lived in a haunted house, and Katsuya He, his wife and sister Hitomi were all killed inexplicably. Granny Xingzhi kept mumbling some strange words to herself. Rika followed her frightened gaze and found an expressionless little boy. So far, strange things have continued to happen to people related to Rika and the Tokunaga family, and they have died inexplicably and without any reason.

These people are inexplicably haunted by evil spirits, and their sudden death not only brings fear to the audience, but also makes many people incomprehensible. To understand, you need to know why this house became a haunted house. It all started with a woman named Kayako. The environment in which she grew up made her feel that she was not needed by others and should not be loved. With the death of her parents and the death of the black cat who had been her only sustenance for many years, Kayako's heart became more and more twisted. She fell madly in love with Toshihiko Kobayashi, a man who didn't love her. The failure to love her made her feel more and more that her life was meaningless. She married a man who told her I want you for the first time in her life, because these three words "I want you" are three very attractive words to her. She gave birth to a son, but her husband learned during the examination that she was infertile. The violent husband tortured Kayako to death. After his death, Kayako and his son were locked in the attic, and their son also died. The deep resentment in Kayako's heart turned her into a fierce ghost, and her son was also used by Kayako to help her mother kill people crazily.

There is no reason why Kayako and her son kill people. She will kill anyone she sees. She attributed all her misfortunes to Xiao Lin. She thought that Xiao Lin would not be like this if he was with her at that time. So the first person she killed was Xiao Lin, and later she hacked to death her husband. If these two people were still related to her, and she was justified in killing them, then there would be no causal relationship between the people she killed later. The happy Tokunaga family who lived in her home were all killed. Tokunaga's sister, volunteer Rika, and Rika's boss who came to her home, and even the security guard of Tokunaga's sister's company were also killed. The police investigating the case , the policeman’s daughter, and friends who had left home were all killed. The twisted Kayako's soul became even more ferocious after her death, and the resentment accumulated in her life became a reason to vent her anger after her death. She kills not just for revenge, but just to vent her anger. She hates the world, she hates everyone who is happier than she is. She feels that if she can't get happiness, others shouldn't get it either. And the way to make them unhappy is to kill them. There is no need for a reason to kill people in Kayako. Anyone she sees will be killed, and people related to the killed person will also be killed.

This may be the scary part of this movie and the incomprehensible part.