Roo-Bi and Roo-Na are twin sisters, whose characters are the opposite of each other. Roo-Bi is the good and loving girl whose fiancé is Gyeong Min while Roo-Na 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 Roo-Na, plans revenge to her.