Three generations of a family are drawn into the profound darkness of forbidden blood ties. Reiko, who was assaulted by her father since childhood, leaves home to escape her suffering—yet under one roof, her sister Natsumi lusts after Reiko's son, while Reiko's daughter, Kasumi, continues an illicit relationship with her brother. Amidst tangled emotions of love and hatred, desire and guilt, the threads of taboo incest entwine once more, ushering in a new era of chaos.