An old woman took in a pretty boy, Luhan into her big mansion after he saved her one night. She planned to take Luhan to be her adoptive grandson but he refused and he also insist to work for her to repay her good deed for giving him place to stay, clothes to wear and food to eat everyday.

The old woman offer Luhan to work at her company, becoming her secretary but Luhan dont want to because he dont have any experience and feels like he's getting too much from the generous old woman. At the same time, a maid at the mansion resign. Luhan ask the old woman if he could work at the mansion instead, she give in after Luhan plead her.

So, Luhan start working as a maid in the big mansion. Yes, a maid. Its not because of Luhan took the work from a maid but because the old woman's driver , Tao together with the mansion cook duo, Kyungsoo and Lay and another maid of the mansion, Baekhyun suggest her to make Luhan wear maid uniforn when he's working and she find the idea interesting and when along.

Then one day, a tall, handsome young boy, a bit younger than Luhan who is the old woman's grandson who just came back from London together with his friend, Kai come live in the mansion. Thats when new love stories start to bloom.