One man would become a legend. Genghis Khan has taken his armies into the heart of China. At the height of his triumph, he is challenged in the west. He cannot turn from it and his sons, his generals will ride. The paths they choose will lead the tribes either to victory, or to utter destruction. His armies will fight against kings, laying waste to cities. His four sons will become the death of nations, but only one of them can follow him as khan.