Rumi, who married into a farming family, is worried that her husband Yusaku is not very active at night, and her only way to relax is to sing karaoke and chat with her friends Midori and Asami who live nearby at a bar. One day, she meets an elderly woman named Komada Kiwako at the bar. Kiwako's son, who works in Tokyo, has embezzled money from the company, and she is trying to pay off the 3 million yen. Listening to the story, Rumi and the other three realize that it is an "I'm your son" scam and take action to get rid of the scammer.