In Book of Love, young, uptight English writer Henry's (Sam Claflin) novel is a resolute failure. He is delighted to find out his book is a surprise hit in Mexico, but when he is invited there to promote it, he soon discovers why--his Spanish translator Maria (Verónica Echegui) has rewritten his dull book as an erotic novel. Henry is furious, and even more so when his publisher insists he and Maria conduct a book tour across Mexico together. Opposites attract, and the chemistry between the couple ensures sparks fly.