Kim's life is perfect, she lives like a princess she easily gets what she wants and as a princess she lived in a very huge mansion... her own castle. She has the looks, the body, rich, brainy, nasa kaniya na ang lahat except the love of her parents na hindi niya naranasan kahit kalian.
Everything is perfect not until their business collapsed, nagkanda patung-patong ang kanilang utang sa bangko, unti-unting bumagsak ang mga negosyo nila, at ang masaklap pa ang tinuturing niyang kastilyo ay pagmamay-ari na pala ng iba, she found out that her Dad use it as a payment of his debt. Everything is a mess, hindi niya aakalain na sa isang iglap lang pala ay mawawala ang bagay na meron siya but the most painful thing that happened to her... her parents left her, they ran away and now they are nowhere to be found.
Kim on the other hand don't know what she will do next, she don't have any money left, no house to stay, ang tinuturing niyang mga kaibigan ay naglaho na parang isang bula ng malaman nilang naghihirap na siya ngayon. Her life is in chaos, not until he met Kai Aiden Lawrence in the most ungrateful moment, and that time that they eyes met Kim's thought that finally her Knight are here. . but that thought suddenly vanish when he heard Kai muttered the word 'Mine'.
And one day Kai offered her a deal, a deal that she will not surely forget. From a very lovely princess to a poor maid, from castle to a maid's den, from very expensive clothes to a maid's uniform, and from gadgets to rags and mops everything turns out to be a nightmare, and thing that she didn't expect she would become.