In 1940, the desert areas of northwest China suffered from a famine year, and the people of all ethnic groups prayed for rain and no results. In desperation, a foreign priest came, and the rain fell, many people became God believers. It is possible to continue in the wild, and people are leaving their homes, and the pastor has left. A shepherd boy has witnessed all this. 40 years later, the young man is a white-haired horse county magistrate (Wang Gang). He has a lot of difficulties in building water conservancy. At this time, news of the United Nations Food and Agriculture Organization preparing to help the poor areas came. Six years later, United Nations official Berman came to inspect. He found that the county magistrate had a breach of contract and the county magistrate was dismissed. Ma County magistrate died on the way back to the village. Bellman has mixed feelings.

Niu Er is a peddler who provides for the widow Gan Cao and her mother and son. Gan Cao sews and cooks for Niu Er but is reluctant to get close to him, because she is in love with Ba Dun, a gambler.

Honoring his father's dying words, a young man comes to the dusty desert village of Double Flag Town to claim his bride. Everyone looks down upon him because he looks inept and ignorant. When he kills a man who is attempting to rape his bride, he provokes the wrath of the Lethal Swordsman who is the rapist's brother and also a famous killer. Will our hero choose to escape with his bride or face the Lethal Swordsman?