Ao stands in the morning kitchen. Her husband, before leaving for work, and her father-in-law, who has fallen asleep at his desk while absorbed in research. In the quiet life of living together, unsettling glances cross paths. She can't help but feel her father-in-law's clinging gaze. Claiming it's "the last research of my life," her father-in-law smiles meaningfully as he looks at Ao, writing down research data alone. Behind the scenes, a dangerous experiment involving memory and emotions was underway. The video her father-in-law presents to Ao, who is troubled by a sudden memory disorder, shows the image of 'another self' that Ao doesn't know. Viewers will be drawn into Ao's confusion and her father-in-law's obsession.