Kim Mi Young (Jang Nara), a hard-working, kind, and shy woman, doesn't have much in the way of education, beauty, or money. However, after a fateful night of accidental passion with Lee Gun, the spoiled, rich heir to a family business, everything changes (Jang Hyuk). Her unimportant life changes completely when she finds out she is pregnant and has to get married quickly. The couple decides to make the best of a bad situation, but just as Lee Gun starts to show Kim Mi Young more and more affection, his first love comes back to claim him.