In the northern part of the western Sichuan Plateau, the mountains overlap and the situation is changeable. 1936, in order to fight against Japan in the north, the Red Army went along the rugged plank road, crossed the steep cliff of the broken ridge and came to the Jinsha River. Chiang Kai-shek reactionaries tried to block the Red Army from crossing the river and sent special commissioners to Heihe City to collude with Wan Li, an enemy of local tyrants. In order to stop the attack and mobilize the local reactionary forces, Qiu Wan Li made a vicious deviant move: he ordered Qiu Jiu, his subordinate, to disguise himself as Cheng Hongjun, cross the river to rob Homa, the only adopted daughter of Tibetan chief Sanger, and provoke the chieftain's hatred of the Red Army. Homa's life was in danger, but fortunately he was rescued by the Red Army vanguard. Autumn Wan Li failed to stop the Red Army and set fire to the granary of Heihe City, leaving an empty city full of fireworks for the Red Army. The Red Army liberated Heihe City, and food could not be replenished. At the same time, Jinsha River is a natural barrier river, which is difficult to cross. There is an ambush in front and a pursuer behind, and the situation is very difficult. However, the vanguard troops of the Red Army finally crossed the Jinsha River at a very fast speed under the fierce artillery attack of the enemy, continued to fly over the sinister and continuous mountains, climbed the steep ice peak with thin air and snow, crossed the vast grassland covered with sand, and reached the edge of Tibetan areas. Autumn Wan Li first sneaked into Tibetan areas, pretending that Homa had been killed by the Red Army, and provided ammunition and weapons to provoke the toast to attack the Red Army; He also destroyed the sink and cut off the water supply of the Red Army. At this critical moment, the political commissar of the avant-garde corps sent an instructor Jin Ming to lead a class to send it.

Huo Mashan explained the party's ethnic policy to the toasts. Qiujiu found Homa and wanted to shoot Homa to death. Jin Ming saw through the enemy's tricks, quickly covered Homa with his own body, and sent another soldier, Tang Xiaomiao, up the mountain to deliver letters to the toast. The toast read the letter and knew that Homa was still alive. His face was full of hatred. Afraid that the plot was exposed, Qiu Wan Li killed Qiu Jiu on the spot, and then secretly killed Tang Xiaomiao, and then left the Tibetan area in a pretentious manner to swindle and coerce the toast. In order to thoroughly expose the enemy's plot, the Red Army sent Jin Ming to venture up the mountain to negotiate with the toast. Homa gradually got to know the Red Army and gave the orb she was wearing to ABBA Jinming. When the toast saw the Bead with a grain of salt, he decided to send his cronies Ren Jieye Ba down the mountain to find out, but said that if Homa didn't come back before sunset, he would kill Jin Ming. Ren Jieyeba went down the mountain and was assassinated by Wan Li's minions. He was injured, climbed to the headquarters of the Red Army and told the Red Army about the situation. The political commissar sent a class to follow Homa and quickly climbed the mountain by copying the path. As the sun sets, the horn on the toast square is harsh, and Wan Li instigates the toast to kill Jin Ming. At this critical moment, Homa arrived. Revenge Wanli scurried, fell into Jinsha River and was killed. The wind is tight and the rain is urgent. The Red Army observed a moment of silence in front of the tomb of the martyrs who died heroically for the revolution, bid farewell to the Tibetans and continued to March hard.

The film describes the process of the Red Army's Long March being blocked when it passes through Tibetan areas. In difficult times, the officers and men of the Red Army resolutely implemented the party's ethnic policy, persuaded and encouraged the chiefs, and foiled the plot of the Kuomintang reactionaries. So as to open the road and continue north.

With a strong pen and ink, the film depicts the heroic image of Jin Ming and other Red Army commanders and soldiers who are not afraid of danger and take care of the overall situation. The plot in the film is tortuous and tense, and the relationship between characters is complex, which shows the criss-crossing social contradictions under the historical background at that time and the difficulty of the Red Army going north to resist Japan.

The film's rendering of Tibetan customs and living habits also adds artistic luster to the work.