Mariko, who has been working as a housekeeper for six years, arrives at the Tabyu household, where she is to assist a single father raising his reclusive son, Shota. In this unusual family setting, tension fills the air. After several days, Mariko senses something unsettling about Tabyu's hostile behavior toward his son and confronts him that night. There, she discovers his twisted desires and true nature, losing her innocence in the process. Traumatized by the incident, Mariko remains tormented and helpless, unable to escape the aftermath.