It is April 1939 and unaware that the German war machine is advancing towards the Channel Islands, seventeen-year-old Meg Colivet and her sister are enjoying a holiday in Oxford with their aunt. Here Meg meets charismatic German undergraduate Rayner Weiss and the couple fall passionately in love. But all too soon, Britain is at war with Germany, Guernsey has been occupied and Meg's family home requisitioned by the German army.

Meg insists on remaining with her father, determined to help save her beloved island from the ravages of war. And then she finds herself face to face with Rayner - now a German officer - once more and her life is thrown into turmoil as they risk their lives to meet in secret . As the conflict in Europe intensifies, basic provisions become scarce and soon the people Meg loves come under threat. Torn between her love for Rayner and her duty to her family and the island she grew up on, a heartbroken Meg has a terrible choice to make...