Mose and her daughter Agna are incomers in the village, treated with suspicion. But young Liva, left out of the secrets her sister Tove and brother Hakken share, idolises Agna and follows her everywhere. Unwittingly, they lead the German soldiers to a perfect island. Once a haven for picnics and story-telling under the midnight sun, it is transformed into a grim POW camp. This is an unlikely place to find buried treasure, but it's there.