Deliveryman Jongsu is out on a job when he runs into Haemi, a girl who once lived in his neighbourhood. She asks if he'd mind looking after her cat while she's away on a trip to Africa. On her return, she introduces to Jongsu an enigmatic young man named Ben, who she met during her trip. One day Ben tells Jongsu about his most unusual hobby.
Haedanghwa, a beautiful woman, comes into the life of a single father and his three grown-up sons all of sudden! The abandoned woman, who does not have any memories about herself, begins her precarious cohabitation with the family of four men. And this is how the intense battle among four men to earn Haedanghwa’s heart begins. However, the story starts going towards a completely unexpected direction as a group of suspicious men appear.
