In a New York apartment, a humorous script reader accidentally reads New York Book Review Weekly when he catches a glimpse of an advertisement from a London bookstore, Mark & Co., 84 Charing Cross Street, providing mail order services.She wrote the first letter casually, but unexpectedly, the letter opened a warm and heart-warming relationship between her and Frank Dell, a bookstore employee, from then on.The words traveled back and forth between the two sides of the British Strait, and books became the carrier of emotions, and an unprecedented dialogue quietly weaved the most moving appearance of friendship.