Katie, a teenage girl from Malibu, California, finds herself in the throes of growing up, facing her parents, her boyfriends, her sexuality and a privileged life. Half a world away in rural China, Lin, who shares the birthday with Katie, faces a much different reality. Because of facial deformity, she lives a life of fear and shame. Her father, Daniel, has devoted his life to her, with hopes and dreams that her circumstances will change one day. The opportunity comes with the discovery of the worldwide "Doctor's Gift" program. Katie signs up for a trip to China. Once there, she is deeply touched by the work, which prompts her to take off on her own to find Lin. A "smile" is brought to Lin's face, Katie finds her soul and their extraordinary connection becomes a life-changing experience for both girls. This movie is based on the work of the charity organization Operation Smile.