Katie Price has a rare disease in which the slightest dose of ultraviolet radiation can be fatal. The girl cannot leave the house during the daytime, so her entire social circle is her father and her only friend. Katie is passionate about music and dreams of having her songs heard by the whole world. That evening, when Katie's peers are having fun at the prom, her fate takes a sharp turn. A girl with a guitar goes to an empty railway station, and there her singing attracts the attention of Charlie Reed, a handsome young athlete with whom she has been secretly in love for several years. This is how two destinies intertwine to spend an almost perfect summer under the stars.