Seventeen-year-old Maddie is on a 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. She becomes part of a group of friends who call themselves GWS, Girls Without Shadows, on the pro-anorexia website thinandbeautiful.com. Sent to 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?