Married for 20 years and sexless for ten, Yuka longs to feel like a woman again. Her quiet life is disrupted by her son's friend, Shingo, a student whose intense gaze awakens her dormant desires. She begins to tease him, enjoying the reaction to her seduction. One night, a major power outage plunges the house into darkness, turning her playful temptations into a raw, physical reality.