Ruby and Runa are twin sisters, whose characters are the opposite of each other. Ruby is the good and loving girl whose fiancé is Gyeong Min while Runa is selfish and a gold-digger. They come to live each others' life after their faces were swapped by a car accident. Gyeong Min, who doesn't have any clue about this, faces a tragic fate, receiving love from both at the same time, and In Soo, who is abandoned by his ex-girlfriend Runa, plans revenge to her.