Yoon Bomi just an ordinary girl, becomes a maid daughter in a big house. She likes a smart boy at school named Park Chanyeol, but he fell in love with her boss daughter, Jina, arrogant girl who is also one class with them, when he heard Jina poem who won a literary contest, Chanyeol fell in love with the word in the poem and try to win Jina's heart after that, with exchanging the letter with poem inside it. But he doesn't know if Jina's poem that win the contest and poem letters he received isn't really made by her, Bomi's is the one who made the poem and reply the letters from Chanyeol. When he know about that, he really upset and angry, he realize that he isn't fell in love with Jina but with Bomi, then he try to get Bomi's explanation but it's too late, Bomi being kicked by Jina's parents after her mom death. He meets her, 9 years later when he's attending his friend, Byun Baekhyun engagement ceremony with her, Yoon Bomi. However, he is heartbroken as Bomi pretends to not remember him at all.