The Legend of Zhang Qian

In 139 BС Zhang Qian, official ambassador of Han Empire, led a diplomatic mission of more than 100 people to the Western Regions. One day Zhang and his guide Tang Yi were surveying a map as usual, but unexpectedly intercepted by the Huns on the way. The Huns captured prisoners for ten years, but it was only beginning of legendary Han expedition.
(Source: TMDB)