Chaste widow Sae is initially reluctant to accept her brother-in-law's degrading advances, but when she learns her daughter Maki has been caught up in drug troubles, she agrees—just this once. On her husband's death anniversary, a humiliating ritual unfolds before the family altar, weaving together sensual allure and deep emotional turmoil. "I'll take her place... just this once, I'm yours to do with as you please," she submits, as a fleeting moment of pleasure strikes at the heart of the story.