A kind school teacher suddenly becomes heir to a large company on the condition she marries the owner's grandson. As she is interested in neither, they make a deal that if they manage to date for a full six months, he will inherit instead.

Jin-wook and Yoo-mi meet at a Gangwon-do resort and get caught up in a series of misunderstandings and accidents. Yoo-mi was charmed by Jin-wook's sly and playful personality, and they ...