Every day, the Saejima couple diligently work on conceiving a child, living a seemingly happy life. Lately, however, wife Kaori has begun feeling as though someone is watching her—especially while doing housework. Though she dismissed it as mere imagination, her fears suddenly become reality one day when her brother-in-law, Makoto, forcefully breaks into her room, throws her onto the bed, and rapes her. Overcome with guilt toward her husband, Kaori suffers deep emotional trauma, carrying a painful secret within her heart.