1944 Austria. A Nazi officer is tipped off that the Spanish Riding School are not only keeping their horses outside Vienna, but sheltering a Jewish boy as well. Jakob hides from them, but has to watch the officer shoot one of his beloved Lipizzaner horses just for spite. Jakob and his guardian know they must get the other horses away, but is it possible to get them all over the mountains to safety? A fleeing Roma girl, Kizzy, joins them, but they face one gruelling trial after another as they try to cross the Austrian mountains, through Nazi territory. Can they do it, and what will be waiting on the other side?