Fourteen-year-old Donnie's older sister, Karen, has always been the one person in his life on whom he could totally depend. But as Karen slowly slips away in the grip of an eating disorder, Donnie finds himself alone facing the trauma of his parents' responsibility to cure his sister's illness and fix his parents' issues, letting every part of himself disappear in the process. It is more important -- and somehow easier -- to figure out if today is a day when Karen is eating, or to know if Dad and Mom or sleeping in the same bedroom, than to deal with his own problems. In the end, though, Donnie must decide whether to float through life unnoticed, or to claim his rightful place as a member of his family and of the world. This powerful story from a brilliant new talent introduces a memorable boy in Donnie, who, from his funny and painfully honest point of view, describes a harrowing year that leaves both him and his family forever changed.