The series is about an incident that takes place when the owners of the boarding house called 'Guest Summer Palace', which breaks stereotypes, and boarders with secrets gather to find Lee Seol who disappeared 13 years ago.

At a difficult place in his marriage and career, a middle-aged man gets a shot at a do-over when he's transformed back into his 18-year-old body.

The hard working, kind and timid Kim Mi Young (Jang Nara) has little in the way of education, beauty or wealth, but all that changes after a fateful night of accidental passion with the spoiled, rich heir of a family company, Lee Gun (Jang Hyuk). Her insignificant existence completely transforms when she finds out she is pregnant and must tie her life to his in a shot-gun wedding. The couple decides to make the best of a bad situation, but just when Lee Gun begins to show his growing affection for Kim Mi Young, his first love re-enters the picture to stake her claim.

A magician meets a weird girl and offers her to work together in his magic show. It's only until a year later that he starts to know her personally and develops a feeling towards her despite her own problems.