A film about the expulsion of the Kuomintang from the coastal islands of the People's Republic of China. In the early 1950s, with the aim of liberating Woyushang Island, the naval base headquarters sent the Third Artillery Squadron, commanded by Longjiang Li, to reconnoiter the enemy's firepower deployment. With the help of local fishermen, they defeated two enemy reconnaissance groups, demoralizing the enemy. The enemy transport ship left Chinese territorial waters. The political instructor led the artillery squadron to intercept the enemy ship to prevent it from bringing in reinforcements. As a result, the navy and air force launched a coordinated operation and liberated Voyushang Island.

In the early days of liberation, Kuomintang remnants fled to the Menghe Tibetan region. The government sent Chen Shaohua’s political work team to secure local chieftain Luobu Danzeng’s help against the enemy. Spy Xie Chunfu deceived Luobu Danzeng, causing conflict between the Menghe and Wari people to undermine the Communist Party and plan a counter-revolutionary uprising. Chen Shaohua implemented ethnic policies to win Luobu Danzeng’s support and investigated the spies’ activities. Xie attempted to poison steward Lang Jie, but Lang Jie discovered the plot. Nationalist spies threatened Luobu Danzeng to detain the work team. Chen Shaohua sent Xiao Li and Dali Jie to the military division. The People’s Government advanced into Menghe, prompting Xie to assassinate Lang Jie to eliminate witnesses. Before dying, Lang Jie exposed Xie’s plot to Luobu Danzeng, who apologised and cooperated with the People’s Liberation Army to eliminate the remnants.