Sooyeon and Donghae's love story could surpass any fairy tale and the only thing missing was their happily ever after. The supposed to be ‘happy ending’ turned into an unforgettable nightmare as Sooyeon died in a shooting rampage, at the exact same place and on the exact same day of their wedding. Yoona, on the other hand, was one of the victims of the so called “massacre” and had been in coma for months. When Yoona woke up, everybody was flabbergasted as she was proclaiming that she was Sooyeon not Yoona. Donghae couldn’t believe it for he thinks that such a thing was impossible to happen. Then suddenly, Yoona started to act the same way as the ‘girl’ whom Donghae had promised to love through eternity. Will Donghae ignore his feelings or will he be able to accept the fact that the ‘girl’ whom he had been longing for returned to his side but was on the body of someone else?