Louisa Webber doesn't believe in imaginary friends-anymore. A betrothed woman of twenty, Lou is expected to marry and provide for her widowed mother and sister. That duty is more important than her dreams, her sanity, and especially her childhood friend, Jay. After all, he doesn't exist-or so she thinks. Jay has lived on Peter's island for a very long time. As a high-ranking imaginary friend, Jay is enlisted to protect Lou during her difficult childhood. But Lou's friendship quickly becomes more important than following Peter's rules. Rules are unfair, anyway. When Peter is captured, imagination and reality collide, trapping Lou on the island with Jay. Desperate to free Peter and return home, Lou must rely on Jay and his band of forgotten children to brave the island's dangers. But the longer Lou remains in Jay's world, the more of herself she forgets-until one buried memory changes her life for good.