Ever since Rosa's nerve disease rendered her quadriplegic, she's depended on her handsome, confident older brother to be her rock and her mirror. But when a doctor from Boston chooses her to be a candidate for an experimental brain transplant, she and her family move from London in search of a miracle. Sylvia—a girl from a small town in Massachusetts —is brain dead, and her parents have agreed to donate her body to give Rosa a new life. But when Rosa wakes from surgery, she can' t help but wonder, with increasing obsession, who Sylvia was and what her life was like. Her fascination with her new body and her desire to understand Sylvia prompt a road trip based on self-discovery… and a surprising new romance. But will Rosa be able to solve the dilemma of her identity?