Thin Girls dauntlessly navigates the world of eating disorders and their hurdle-strewn roads to recovery- and fearlessly offers a message of hope. Rose and Lily Winters are twins, as close as the bond implies; they feel each other's emotions, taste what the other takes in. Like most young women, they've struggled with their bodies since childhood, and high school finds them turning to food- or away from it- to battle the waves of insecurity and the yearning for popularity. But their connection can be as destructive as it is supportive, a yin to a yang. When Rose stops eating, Lily starts- consuming everything Rose won't or can't.