Odin Lewis has always known he is different from everyone else: he can levitate objects, look into the past, and learn things no one else can. Now, approaching his seventeenth birthday, Odin's life is changed when his old friend Wendell returns. Trouble is, Wendell isn't real, he's an imaginary friend absent since Odin was still a child. Wendell brings with him secrets both powerful and disturbing. Under Wendell's influence, Odin begins to question everything he thought he knew about himself, his family, his friends, and his entire life, while slowly learning more about his powers.