September 1939. The world is on the brink of war. As his dad marches off to fight, Noah makes him a promise, to keep their beloved family dog safe. When the government advises people to have their pets put down in readiness for the chaos of war, hundreds of thousands of people do as they are told. But not Noah. He's not that sort of boy. With his two friends in tow, he goes on the run, to save his dog and as many animals as he can. No matter what.