Living with her husband Takashi and his father in Takashi's family home, Asuka finds herself increasingly alone with her father-in-law whenever Takashi leaves for work. The father-in-law is kind and considerate, making Asuka feel at ease around him. However, he knows she has a low tolerance for alcohol and gets drunk easily, even from small amounts. One day, he secretly gets Asuka intoxicated, then takes advantage of her as she stumbles and stands dazed. Passing out and losing her memory, Asuka writhes shamelessly, exposed and defenseless before her father-in-law. Yielding to his desires, she gradually falls under his control, losing herself completely.