Freshman year is going well for Cassie, a standout sprinter who is about to move up to varsity; her best friend Tara is also running track, and Tommy, that cute sax player she likes has asked her to come see his band rehearse. But in a matter of weeks, Cassie has a secret she is trying to hide from everyone. Her hair has started falling out, and she s doing everything possible to keep it from showing. When her parents tell her it happened to her once before, at age 3, she s horrified, and a trip to the dermatologist confirms what she has been afraid of: that all of her hair may fall out. She has alopecia, and there s no known effective treatment. Cassie eventually gets a wig when she can no longer disguise the truth, and she finally confides in Tommy about it. But when he starts being standoffish and avoids her, she feels betrayed. Then, at a track meet, Robin, her rival on the team, exposes her secret to the whole crowd. With her worst fears realized, will Cassie ever be able to face her classmates, her teammates, and most of all, Tommy?