Ai is a widowed woman grieving the loss of her husband, Makoto, in a traffic accident. After the funeral, Makoto's father, Toru, forces her to make a difficult decision. He says that there is no reason for Ai to live with the Ozawa family now that they have no children. Seeing Ai's panic, Toru's eyes change and he makes a suggestion. Toru says that if Ai were to conceive Makoto's child and carry his child, the Ozawa family bloodline would continue. That night, Ai, despite her conflicted feelings, decides to get pregnant and heads to Toru's room...