A dangerous love triangle between twin brothers. People call Seo-rin “the Cinderella who turned her life around,” a scandalous woman who walked a tightrope between two brothers and came out on top. After losing her parents, Seo-rin was adopted as the foster daughter of the powerful Taegang Group, where her most precious person became the eldest son, Tae Ha-jin. When Ha-jin falls into a coma after an accident, his twin brother Tae Si-jin approaches Seo-rin, and the perilous triangle begins. “Amazing. Tae Ha-jin still has that much influence over you.” “Ha-jin is… the most precious person to me.” “Ah, your first love.” To continue Ha-jin’s life-support treatment, Seo-rin needs Si-jin’s consent. But the only thing Si-jin offers in return is a gaze full of impure intentions. “There’s only one thing you can sell to me.” In the end, to save Ha-jin, Seo-rin agrees to marry his twin brother Si-jin. Yet on their wedding day, Ha-jin miraculously opens his eyes…