In the movie Young Sister In Law 3, 2 women live together in a country house in a quiet province. Ji-eun practices yoga in the morning and sobs at historical dramas, while Bo-young is busy cleaning the house alone today. Jee-eun focuses on acting in provocative yoga clothes, but Bo-young finds it a pity.
Meanwhile, Byung-soo visits her senior’s house (their house), who is abroad to write a movie script, and Ji-eun is troubled, saying that she received a call from her husband but doesn’t know if he will come. Soon, he sees the envelope of money that Byung-soo gives him and takes it, saying that since this happened, let’s stay for a month.