Chun Woo Hee plays Han Gong-Ju, the eponymous heroine, a glum high school girl who has been forced to transfer to a school in another city. With her own family nowhere to be found, Gong-ju is placed into the care of a teacher's mother while matters are being sorted out She quietly starts up school again, only hoping to keep to herself and not stand out. When Gong-ju's new classmates discover her singing talent, they try their best to recruit her into the choir. Just as Gong-ju begins to smile again and open up to new friends, the past catches up and the harrowing reason for her transfer gradually comes to light.
Woo-hee Chun, In-seon Jeong, So-Young Kim, Yeong-ran Lee, Ji-won Baek, Han-bin Jeong, Choeyongjun Kim, Hyun Joon Kim, Jung-suk Kim, Bum-Taeg Kwon, Chung-hee Lee, Sang-Heon Lee, Kyoung-jin Min