Seventeen-year-old Maddie has always felt a hole in her life, but she has finally found a way to fill it with her quest to mold her body into her ideal, thinnest shape. When she comes across the world of "thinspiration" websites, where young people encourage each other in their mission to lose weight, she quickly becomes addicted. Finally, she has found a place where she is understood and where she can belong. Maddie becomes a part of a group of friends who call themselves the GWS, "Girls Without Shadows", on the pro-anorexia website thinandbeautiful.com. Here she finds the respect and support she feels she doesn't get from her family and friends in the so-called real world. 

Now in a rehab facility where they are trying to fix a problem she doesn't think she has, Maddie is forced to keep a diary tracing how she arrived at this point. Angry that she is barred from accessing her online friends, Maddie refuses to believe she needs help. Will a tragedy change her mind?