A year after dating, the newlywed Yūko joins the Takamiya household, beginning a new chapter in their lives. Though young and beautiful, she must navigate daily life under the watchful, hostile gaze of her resentful mother-in-law and her cold, disapproving brother-in-law. Despite the uncomfortable environment, she struggles to persevere, supported by her husband's kindness. However, one day, Yūko uncovers the Takamiya family's dark secret—and is drawn helplessly into its shocking truth.