To care for her senile father-in-law, Honami and her husband had moved to a new home. But their marriage had grown cold, and as Honami struggled with the daily burden of caregiving, she gradually lost her smile. The only one who became her emotional support was Dr. Kono, a physician with whom she had once worked at a hospital. He began making house calls, tending to her father-in-law while secretly meeting Honami. The two passionately embraced in private, when her father-in-law was absent. Unseen by them, the father-in-law watched their intimate moments from behind the sliding door. Meanwhile, the secret also reached Kotani, a male caregiver who harbored romantic feelings for Honami. As family bonds and hidden desires collide, a complex web of relationships unfolds.