Yuri lives alone with her only son, Takumi. Haunted by the shadow of her late husband, she has a timid and indecisive personality. Targeting her vulnerability is her son's so-called friend, Sakaki. One day, he discovers Yuri masturbating and uses what he saw to manipulate and get close to her. A few days later, while Takumi is away at work, Sakaki breaks into her home and assaults her, taunting, "You want a man, don't you?" He returns again, bringing along another friend, Haraguchi, subjecting Yuri to repeated sexual abuse. Unable to endure the ongoing violence, Yuri's mind and body begin to break down.