An extraordinary road to emotional healing opens up for an selfish antisocial children's-book writer and a selfless psych-ward caretaker when they cross paths.
Having married young, when frustration with their lives make Choi Ban Doo and Ma Jin Joo regret their marriage of 18 years, a strange occurrence has them traveling back in time to the day before they met and into their younger selves.
The story takes place in Joseon period, when power struggles surrounding the throne had reached extreme levels. In order to escape those who plan to assassinate him, the King puts a clown, who looks exactly like him, on the throne.
Set in a fictional country called Daeho, it is about the love and growth of young mages as they overcome their twisted fates due to a forbidden magic spell known as the "alchemy of souls", which allows souls to switch bodies.