After her father’s death, Ran lives alone with her mother, Sumie. While Sumie is away on a trip, a man claiming to be her former office supervisor arrives at the house. His expression turns vicious as he explains that he once competed with Ran’s father for her mother’s love. After losing, he raped Sumie in front of Ran’s father and spent twenty years in prison. Spitting out his grudge, the man attacks Ran, beginning the ordeal that will eventually end with his arrest.