After being suddenly laid off, Hyeong-gu becomes a security guard and takes a job as a male housekeeper at Ban Chang-go's house to support his younger brother. Although he makes constant mistakes, he overcomes crises through his resourcefulness and the help of his employer. At the market, he is mistaken for a stalker while following the neighbor's housekeeper, but that encounter leads him to meet and date Hyun-ok. Suffering from Ban Chang-go's disregard, he feels that housekeeping is not a job for a man. Just then, his brother gets a job at a major corporation and recommends him as the head of security. Hyeong-gu proposes to Hyun-ok and she accepts, revealing that she is the daughter of the company president where he worked part-time.