The queen of department stores and the prince of supermarkets weather a marital crisis —until love miraculously begins to bloom again.

An AI programmer accidentally develops an AI program called Cho Sang Shin, which will identify trashy humans, and she uses it to save people who are in difficult relationships.

Nam Se-Hee is a single man in his early 30's. He has chosen to not marry. He owns his home, but he owes a lot on his mortgage. Yoon Ji-Ho is a single woman in her early 30's. She does not own a home and envies those that do. She has given up on dating due to her financial struggles. Yoon Ji-Ho begins to live at Nam Se-Hee’s house. They become housemates.