It's 1943, and Lily Tregenze lives on a farm, in the idyllic seaside village of Slapton. Apart from her father being away, and the 'townie' evacuees at school, her life is scarcely touched by the war. Until one day, all 3000 villagers, are told to move out of their homes - lock, stock and barrel. Soon, the whole area is out of bounds, as the Allied forces practise their landings for D-day, preparing to invade France. But Tips, Lily's adored cat, has other ideas - barbed wire and keep-out signs mean nothing to her. Frantic to find her, Lily decides to cross the wire into the danger zone to look for Tips herself!