In the Hokuriku grassland, the cold wind is howling, and the Ulan tribe is facing an unprecedented crisis - the plague is spreading, food and grass are exhausted, the tribe members have suffered numerous casualties, and they are on the verge of despair. As for Nanzhou in the south, as a representative of farming civilization, it is rich in products, but it lacks war horses all year round and cannot resist the intrusion of other nomadic tribes in the north. The Emperor of Nanzhou proposed a cooperation proposal of "exchanging grain for horses", but was strongly opposed by the conservatives of the Ulan tribe. They remembered the past when their ancestors were deceived by Nanzhou and were determined not to cooperate with the Nanzhou people. At the same time, Zhou Biao, the general of Nanzhou Zhennan, was ambitious and attempted to annex the Beiliu grassland in the name of cooperation. Lan Yue, the 17-year-old female leader of the Ulan tribe, is both strong and soft. She has both the bravery of the nomads and the foresight beyond ordinary people. She is well aware of the desperate situation of the tribe and is determined to break the barriers. She goes to Nanzhou to negotiate in person. On the premise of adhering to the interests of the tribe, she promotes cooperation and resolves internal and external crises. In the collision of nomadic and farming civilizations, she composes a song of survival for the Ulan tribe.
