The Dayin Dynasty has been peaceful for a hundred years, but there are turbulent undercurrents. Han Feng, a junior high school student in the northern border army, was forced to go into exile due to a bizarre defeat and frame-up by his superiors. He was stigmatized and killed. At the same time, in the imperial capital of Chang'an, Su Yingluo, a young female official who was known as the "Emperor's Eyes" but was blinded due to an accident, relied on her extraordinary ear power and mental arithmetic ability to inadvertently touch upon a huge conspiracy that could overthrow the dynasty in the turbulent court. From the snowy plains of northern Xinjiang to the mist and rain in the south of the Yangtze River, from the beacon fire at the border to the secret fight in the palace, the fate of two people who were originally separated from each other unexpectedly intertwined. One of them saw clearly with his broken body in the light, the other fought for his life in the dark with tenacity, and together they were involved in a huge whirlpool concerning the fate of the world. This is a story about survival, verification, and exploration. It is a legend about how individuals stick to their inner light and tear apart the dark curtains in the context of a grand era.