Zoe and Cara were as close as friends could be--until Zoe moved away in fourth grade. Miserable without Zoe, Cara grew into an unhappy sixteen-year-old, tormented by the popular girls and nursing a hopeless crush. Then one day Cara returns home from a miserable day at school to find Zoe sitting on her bed. Shocked and delighted, Cara agrees to hide Zoe from troubles at home and the two resume their friendship as though no time has passed. Zoe even helps Cara get up the courage to stand up for herself and talk to her crush. But when one of the popular girls winds up dead, Cara begins to suspect that Zoe is responsible, and her questions only feed Zoe's anger. As Cara searches for answers, she is forced to confront a deadly truth....