Best friends Caddy and Rosie are inseparable. Their differences have brought them closer, but as she turns sixteen Caddy begins to wish she could be a bit more like Rosie – confident, funny and interesting. Then Suzanne comes into their lives: beautiful, damaged, exciting and mysterious, and things get a whole lot more complicated. As Suzanne’s past is revealed and her present begins to unravel, Caddy begins to see how much fun a little trouble can be. But the course of both friendship and recovery is rougher than either girl realizes, and Caddy is about to learn that downward spirals have a momentum of their own.