It’s 1944. Twelve-year-old Grace Devine lives at Blacksod Lighthouse and weather station in County Mayo with her parents and little brother. When a German plane crashes nearby, she and her best friend Sibby risk their lives to save the young pilot. Grace’s family take him in, but their neighbours are horrified at having an ‘enemy’ in their midst.

Meanwhile, the Met Office in England suddenly asks Blacksod to send them weather reports every hour. But why? As the wind and rain howl outside, Grace begins to understand that something important is happening, something to do with the war – and she is right in the eye of the storm.