Matsubara Shumi's parents divorced when she was a child, and her willful and selfish mother did not take good care of her daughter. Every day when the children in the kindergarten are picked up by their parents, only Shumei waits alone. The fear of being abandoned follows her until she grows up, so Shumei is determined to protect her family and give her children the greatest safety and happiness. But things backfired, Shumei and her husband Hamada's marriage life is not satisfactory, forced to divorce. For the current Shumei, there is no person in the whole world who is more important and worthy of love than her little daughter.
In order to compete for custody of her daughter, Shumei hastily decides to move to a large apartment that has been built for years. But that house always gave Shumei the feeling of "something that I can't see", and her daughter Ikuko's intuition was even stronger. The house is very humid, there is a strange smell in the sewers, water starts to seep from the ceiling shortly after the check-in, and the footsteps of children running on the floor upstairs are often heard, everything is a bit mysterious.
Yuzi found a discarded red schoolbag on the top floor, and she happily took it down quietly. After Shumei found out, despite her daughter's objection, she returned the schoolbag to the apartment management office. A few days later, the schoolbag mysteriously returned to the top floor and lay there quietly. Such a strange thing is really not a big deal for Shumei and her daughter who are determined to start a new life.
The custody case in court is not going well. In order to get her daughter back, Hamada reported to the judge that Shumei had gone to a mental hospital to see a doctor. Shumei was eager to protect her daughter and slapped Hamada several times in court. Fortunately, a lawyer Kishida sympathized with her, and with his help, the lawsuit developed in Shumei's favor.
Ikuko suddenly passed out in the kindergarten. It turned out that she was hiding in the corner and saw the horror in the empty kindergarten. But when she woke up, she couldn't recall anything. At the same time, Shumei at home was surrounded by an invisible and eerie atmosphere, and her emotions suddenly began to go crazy.
Two years ago, a child disappeared in Yuko's kindergarten. The mysterious event seemed to be a whirlpool, and from this moment on, everyone was slowly approaching
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