The play tells the story of the four brothers and sisters of the Mo family who, in response to the call of the country, came from Nanjing to the Inner Mongolia grasslands to study and live with herdsmen in a specific era. They made life choices and self-discovery in life, and fulfilled their promise to take root in the grasslands and build the frontier in the struggle, and experienced joys and sorrows. They cried because of cultural differences and difficult environments, and laughed for the harvest of touching love and precious friendship, and spent their youth and life on this land. However, the rapid development of the times began to make them doubt the monotonous grassland. After they rushed into the colorful world and were beaten and bleeding, they suddenly looked back, and the grassland still called and embraced their return with the most gentle attitude.