Taizong's youngest son, Li Youran, fell asleep in the 23rd year of Zhenguan with his father's "Youran" instructions, and woke up more than 200 years later in the troubled times of the late Tang Dynasty. The world is falling apart, vassal towns are separatist, Huang Chao is about to rise, and the great rupture of the Five Dynasties and Ten Kingdoms is imminent. He has no system or prophet, only a heart that has seen the prosperous times. Stand up from the refugees, walk on the edge of the knife, gather talents, lay the foundation, and in the sliver of heaven that Yuan Tiangang and Li Chunfeng intercepted with their lives, one person can turn the sky and rebuild the rivers and mountains. This is not a person's journey, but the redemption of an era.