Newlywed Nana Mi finds herself living with her husband and his mother. Her husband is busy with work, often returning home late. One night, while the couple is alone together in the living room, a sudden thunderclap causes a power outage. Her husband gets up to check the electrical panel, leaving Nana Mi alone. Frightened in the dark, she's approached by her mother-in-law, who begins touching her body. Unable to resist, Nana Mi ends up giving her mother-in-law a blowjob. Taking advantage of the blackout, the mother-in-law tampers with the electrical panel to prolong the outage. The next day, the power is still out, and her husband sleeps nearby, unaware. Still, the mother-in-law continues to pressure Nana Mi. In the afternoon, a repairman arrives, but even then, Nana Mi finds herself giving in, saying "This is the last time," while growing increasingly aroused.