In 1946, writer Juliet Ashton receives a letter from a stranger on the island of Guernsey, sparking an unexpected friendship. Through letters, she learns about the quirky 'Guernsey Literary and Potato Peel Pie Society,' a book club formed as an alibi during the German occupation of World War II. Juliet is drawn into the islanders' world, discovering their heartwarming, funny, and heartbreaking stories of resilience under occupation. Her journey to meet them changes her life and helps a community heal from the scars of war.