Europe is ravaged by war. Facing imminent invasion from Germany, the British Government decides to evacuate the Channel Islands of all troops and any civilians who want to leave. On June 30 1940, the German troops arrive and, from the beginning, they meet unofficial opposition thanks to three rebellious children who decide to form a resistance cell. With the help of a secret radio set and a small band of adults, the children create mayhem and frustration for German officer Major Heinrich Wolf and his men.