Feeling her father-in-law's lingering gaze, Ao stands in the kitchen in the morning. Her husband is about to leave for work, and her father-in-law is engrossed in his research, sometimes falling asleep at his desk. In the midst of their quiet cohabitation, an unsettling gaze intertwines between them. "This is my last research project," her father-in-law says, a meaningful smile on his face as he gazes at Ao and writes down his research data alone. Behind the scenes, a dangerous experiment concerning memory and emotion is underway... Suddenly, memories resurface...