Lee Jonghyun is a rich man's son. Yoona is a poor unemployed woman's daughter. What happens if one day, both Jonghyun and Yoona cross paths? Jonghyun's family owns the Lee Inc. Company. One day, Yoona was out on a delivery. Coincidentally, she has to deliver a valuable vase to Lee Inc. where she met Jonghyun, the arrogant son of the owner of Lee Inc. Almost immediately, both had become each other's enemies and a fight with Jonghyun caused her to break the vase. Since she has no money to pay for it, Mr. Lee asked her to be one of their personal maid and work until she pays the amount of the vase in full. Despite her not wanting to do anything with Jonghyun, she has no choice but to accept the offer. When Jonghyun found out about this, he asked Yoona to be his personal maid just to annoy her. How will Yoona and Jonghyun's life be turned around? Will Yoona be strong and not fall for her boss' son or will she let fate take over? Are they meant to be not together or are they a match "maid" in heaven?