A young couple, Wan-jin and So-hee, are living with Wan-jin's single father, Seok-bong. Seok-bong was preying on his daughter-in-law, who was doing the housework and preparing meals for him while her husband was away at work. He pretended to have dementia and attacked her. So-hee, who was suffering from her shame, suggested to Wan-jin to hire his father a caregiver, saying that his father seemed to be suffering from dementia, and so Bok-ja, a sexy and voluptuous caregiver who was about Seok-bong's age, came in. Seok-bong is captivated by Bok-ja's passionate charm and soon begins to share his love with her, and in this way, she takes the place of Wan-jin's new mother.

The young deputy Dong-sik and his wife, along with the middle-aged couple manager, went on a trip together as a couple. In fact, Dong-sik became involved in their friendship trip with ambitions for promotion. However, Dong-sik's wife, Eun-joo, takes care of her wives and is full of dissatisfaction because she seems to have become a helper for them instead of a trip. By chance, Dong-sik witnesses the manager's wife, Mal-sook, having an affair with her manager Seong-gil. In order to shut Dong-sik's mouth, Mal-sook starts her secret proposal...