Go Mi Nam (played by Park Shin Hye) is the new member of the fictional band, ANJELL. Go Mi Nam suffered an injury and resided in America, thus prompting his twin sister, Go Mi Nyu to take his place in the band. Go 'Mi Nam' (actually is Go Mi Nyu) is portrayed as sensitive, niave and she wants to be a nun. Slowly, the other members discover her secret. Kang Shin Woo was the first to discover her indenity yet he continued to help her conceal it without her knowledge. Hwang Tae Kyung, the leader of ANJELL, stumbles on the secret. Throughout the drama, conflicts arisen as Mi Nam starts to like Tae Kyung.
You’re Beautiful follows teenage pop idol group members and their growth, love lives, and conflicts as they progress in their careers. Jang Geun-seok plays a young simple country boy who becomes part of a idol boy band.The premise of the drama will follow the story of the top 3-member idol group, who is searching for a 4th member. Lee Hongki, Jang Geun Suk and Yonghwa recruit a new male member played by Park Shin Hye, but when he suffers an injury, Park Shin Hye's twin sister, also played by Park Shin Hye, takes over.