It's January, 1946, and London is emerging from the shadow of World War II. Author Juliet Ashton is having a terrible time finding inspiration for her next book when she gets a letter from Dawsey Adams from Guernsey, a British island that had been occupied by the Nazis. He finds her address in a used Charles Lamb volume and wonders if she might be able to help him learn more about the author. As Juliet and Dawsey exchange letters, she learns about the Guernsey Literary and Potato Peel Pie Society, a unique book club formed on the spur-of-the-moment, as an alibi to protect its members from arrest by the Germans. Captivated, Juliet sets sail for Guernsey, and what she finds there will change her life forever.