Saki, a young newlywed starting her life with her husband in Tokyo, had hoped for a peaceful married life. But her world is disrupted by the presence of her brother-in-law. Unemployed and addicted to gambling, he frequently visits their home whenever he runs out of money. Lately, he's begun showing up when her husband is away. Though she resents him deeply, she can't bring herself to treat her husband's older brother harshly. And once again, he shows up today... bringing unexpected changes to their marriage.