You live in Tibet with your family. Once a year, your father travels with a caravan of people, ponies, camels and dogs across dangerous mountain trails to faraway India. The caravan brings yak wool from Tibet and beautiful silks from China to India, where they are traded for spices and tea. Your father's helper can't join him this year. Are you brave enough to take his place? The fate of all you have ever known is in your hands.
