January 1946 and writer Juliet Ashton receives a letter from Guernsey from a man, who has found her name written inside a book. As they exchange letters, she is drawn into the eccentric world of The Guernsey Literary and Potato Peel Pie Society, which boasts a charming cast of characters, from pig farmers to phrenologists, literature lovers all. Captivated by their stories, she sets sail for Guernsey, and what she finds will change her forever.