Kang Baek Ho is at the wedding of his best friend, who was also his primary school classmate. Baek Ho realises he has always been in love with her, but, due to his ineptitude as a friend, he has never managed to reveal his true feelings. After the wedding, feeling lonely and depressed, he meets a strange man who will take him back in time to put his mistakes right and fulfil his dream: to marry Ham Yi Seul. Will Baek Ho manage to change the course of the past for a better future?