The heroine has a large scar on her face. Abused by her family and bullied by her younger sister since childhood, she values kinship too much to leave home. As a child, she met the male lead and hummed a song for him. With his encouragement, she dreamed of becoming a pop star. However, due to her appearance, her mother forced her to become her sister's ghost singer, turning her sister into a top celebrity. Later, the heroine adds a familiar childhood melody to a song. The male lead recognizes it but mistakenly identifies her sister as the girl from his childhood. He not only signs her as a spokesperson but also gets engaged to her. Upon hearing the news, the heroine gets into a car accident while in a daze. The person who hits her is a wealthy female tycoon. To make amends, the tycoon offers to compensate her. When the heroine learns the tycoon's daughter has just passed away, she proposes to undergo plastic surgery to look like her. The tycoon agrees and accepts her as her own daughter. After the surgery, the heroine goes to a singing competition and performs the familiar song, arousing the male lead's suspicion. She then exposes her sister's true colors and the ghost singer arrangement, proving she was the girl he met in their childhood. After recognizing each other, the two leads find their happily ever after.
