After twenty-year-old Bill Winder tragically loses his young wife Kathy in childbirth, he finds himself mysteriously reunited with her and his baby some twenty years in the past. He slowly realizes that somehow he is living the life of his own father, implying that the son he and Kathy are raising will grow up to be him--but only if they can relive and reinvent their lives without a single mistake. The story begins in 2012 at a college in Cambridge Massachusetts, where Kathy, a self-reliant idealist, and Bill, a charming but troubled Romantic Poetry major, fall in love and marry, only to see...