In the late years of the Republic of China, the mountains of Dehong in western Yunnan were dry and cracked. Chieftains were exploiting and bandits were raging, and the mountain official system was in turmoil. The 24-year-old mountain official of the Muri clan Zao Leyang, with a long sword embedded in his waist and familiar with Tongdela customary law, guarded the land and protected the people in desperate situations. He used customary laws to resist the violence of the chieftain Daoma San, and relied on mutual assistance to open up wasteland to relieve the people's hunger. However, he painfully realized the shortcomings of the old system in the bloody battle between internal and external attacks. The red flag of New China is flying, and the PLA work team brings the dawn of ethnic equality and land reform. Leyang broke through the gap between tradition and new life, and joined hands with his fiancée Nanbo to break the bad habits of hierarchy, united the masses to put down the rebellion, and finally abolished the privileges of mountain officials and promoted democracy. He turned around and became a national cadre, leading the people to divide their fields and expand the land, establish literacy programs, renew cultural heritage with Munao Zongge, and swear an oath of family and country on the border. The long sword breaks the old power, the spark lights up the mountains, and the transformation of a mountain official composes a magnificent epic of the unity and rebirth of the border people.
