In 1914, warlords were fighting and the powers were surrounding them. The two horses of Zhaoling Mausoleum disappeared mysteriously. In that dark era, the dirtiest night in history, six horse carvings were found in the tomb of Li Shimin in Zhaoling Mausoleum in Shaanxi Province. They were called the Six Horses of Zhaoling Mausoleum and were priceless. In the bloody night, two of the horses were stolen. Tang Zhenhua (played by Tian Liang), the keeper of Zhaoling Mausoleum, tracked them all the way to the capital. The driver who smuggled the national treasure was killed on the street, and the clues were interrupted. Was it murder to silence the witnesses or was there another hidden story? Mysterious characters from all sides took turns to appear, but there was a shocking conspiracy behind the murder...