Two years ago, Bett was feisty, athletic, fearless, a girl who would bike down a mountain just for the thrill of it. One day, she dares a friend to do something, and it goes wrong, and only horror and guilt come after. Now, Bett lives her life divided into Pluses and Minuses--Pluses are things that are good, which she knows she doesn't deserve, and Minuses are punishments she deserves, usually in the form of wrecking her body through binge eating. However, punishing herself makes her happy--which in her system may be a Plus. Her system starts to break down, and revelations about the dare and prank-gone-wrong threaten to be revealed.