Hyeon-goo, who got a job as a housekeeper at Mi-na and Seung-mo's house, goes to work for the first time, promising to work hard. Mi-na calls Hyeon-goo, saying she has other things to do besides cleaning, and Hyeon-goo diligently completes Mi-na's work. Then one day, Mi-na makes a new proposal to Hyeon-goo, who was enjoying a secret love affair with Mi-na...