In the Goryeo period, Sun Ok Nam was a fairy. She came down to this world and took a bath at a waterfall on Gyeryong Mountain. While she took the bath, a woodcutter took her fairy clothes and hid them. Because of this, Sun Ok Nam could not go back to Heaven. She then married the woodcutter and they had two children together, but her husband died from falling off of a cliff. Sun Ok Nam tried to find her fairy clothes, but she still could not locate it. Needing her fairy clothes, she decides to wait for husband to be reincarnated.
Now in the present day, she makes coffee at a cafe on Gyeryong Mountain and waits for her reincarnated husband. Finally, after 699 years, she gets a feeling that one of the two men visiting her cafe from Seoul is her reincarnated husband. Sun Ok-Nam is not sure which one of the two men is her husband. She deicides to follow them to Seoul to find out.
Lee Yul is the Crown Prince of Joseon, a perfectionist who disregards the majority of those in the royal palace and appears cold and demanding when in reality, he is just lonely. One day, he passes a law stating that all Korean citizens of marriageable age must do so before they reach the age of 28.
Hong Shim is a strong, intelligent woman who takes on multiple jobs to support herself and her father. She is also the oldest unmarried woman in her village and is in need of a husband in order to avoid punishment from law officials.
In an attempted assassination, Lee Yul finds himself severely injured and under Hong Shim and Hong Sim's father's care. Due to his injuries, Lee Yul develops temporary amnesia and wanders around aimlessly as a commoner with no name or identity. Because of the law passed by Lee Yul, he and Hong Shim are forced to marry each other in order to save Hong Shim from punishment as well as her village from the drought.
What follows is the love story of Hong Shim, 'Joseon's oldest unmarried woman,' and Lee Yul, the amnesiac Crown Prince.
