In the middle of World War I, nine British soldiers caught behind enemy lines seek refuge in a complex network of German trenches. What they soon discover is that they aren't alone - and it isn't a German soldier that's hunting them down.
Grandpa Ward gives a horse he found to his grandchildren, who keep it in their tower-block flat in Dublin. The horse is stolen from them, and the two young boys set out to find it and flee on it.