The Messenger Karakorum

William of Rubrouck, a Franciscan brother, journey to Karakorum, the capital of the Mongol Empire, to restore the Grand Khaan Mengu (Mongke) a message from the King of France Louis IX (Saint Louis). Attacked on the road, he is saved by three young Mongolian Tumur, Sayan and Bichu that will also to the capital. They decide to make the journey together.