The film tells the story of the unfortunate times of the beautiful nurse Amatsuka. It begins with her day of visiting a rich old man for a medical examination alongside a doctor. The doctor advises her to stay and take care of the patient, but she does not expect that the old patient would be extremely depraved, as he tries to assault her while she is washing him. Despite her fierce resistance, he eventually lets her go. This seems unremarkable until her wayward younger brother causes trouble, committing crimes that lead to criminals coming to their house to rape her. Seeing his sister in such a situation, her brother can't bear it and stabs the thug with a knife. The situation escalates, and although her brother should go to jail, he is saved by the old man she cared for the other day, who spends 30 million yen to cover the costs, forcing her to become the old man's sex slave and do anything he wants. Her life has been a long series of miserable days...
Why is this series in the incest genre, because at the end of the movie, the bastard brother after seeing his sister naked like a pupa being raped, the bestiality in him rises, he admits that he has been craving his biological sister for a long time, and then, he also joins the rapists to play his sister.
At the end of the film, it is very surprising that the old man is Amatsuka's mother's lover but is rejected because of poverty, so he strives to be rich to repay his grudge, but because she has passed away, she has to bear it all... Everything was in his plan.