Kang Baek Ho and Ham Yi Seul have been best friends since elementary school. Baek Ho has never acknowledged his attraction to her, unaware that Yi Seul has been in love with him for more than 20 years. Finally, at the wedding ceremony where Yi Seul is about to marry another man (Jin Won), Baek Ho regrets that he never confessed his love for the bride. A mysterious conductor suddenly appears and offers him a second chance to win Yi Seul's heart. Baek Ho travels back in time to various events of their lives hoping to change the outcome of their relationship. But changing the future is not as easy as it seems. (Source: Wikipedia)