When private school student Isabelle Warren first meets Dominican-American Alex Rosario on the downtown 1 train, she remembers his green eyes and his gentlemanly behavior. He remembers her untroubled happiness, something he feels all rich kids must possess. That, and her long dancer legs. Over the course of multiple subway encounters spanning the next three years, Isabelle learns of Alex's struggle with his father, who is hell-bent on Alex being a contender for the major leagues, despite Alex's desire to go to college and become a poet. Alex learns about Isabelle's unstable mother, a woman with a prejudice against Latino men. But fate--and the 1 train--throw them together when Isabelle needs Alex most.