Monsieur Perdu calls himself a literary apothecary. From his floating bookstore in a barge on the Seine, he prescribes novels for the hardships of life. Using his intuitive feel for the exact book a reader needs, Perdu mends broken hearts and souls. The only person he can’t seem to heal through literature is himself; he’s still haunted by heartbreak after his great love disappeared. Finally opening a letter from her, he sets off on a mission to seek a resolution to his own story.