In 848 AD, Shazhou of the Tang Dynasty fell to Tubo for nearly a hundred years. Liang Yanqing, the painter of Mogao Grottoes, hides a fatal secret under the flying murals - every line in his painting is a code for the rebel leader Zhang Yichao to regain his homeland.
When the appreciation of the Tubo nobles turned into the most dangerous scrutiny, and when mysterious third-party forces snooped in the dark, Liang Yanqing discovered that every stroke he made was not only related to the outcome of a war, but also affected the pattern of the entire Western Region. Before the paint dries up, he must use a Thousand Buddha Grotto to lay out a huge picture, and complete a silent gamble under the gaze of the Buddha's light.
This is a competition between art and conspiracy, but also a game between faith and family and country. When the flames of war end, who can read the heroic hymn written by silence from the sky full of yellow sand and magnificent paintings?
