In the summer of 1949, Chen Gang, the commander of the Fourth Field Platoon, led his troops into Dongting Lake. He is from Shandong and has never seen such a big water. There are seventy-four groups of bandits on the lake. The bandit leader Huang Di has hidden three thousand ancient books. Zhou Lie has cut the tongues of more than a dozen women. Golden Hook Beard can swim faster than anyone else without one hand. In this swamp, Chen Gang had to learn how to swim, recognize the mud, squat under the water with a reed pipe in his mouth, and wait for the secret signals. He also wants to understand one thing - those women who were sold for three measures of rice, the fishermen who were forced into the lake by the fishing tyrants, and the old bandit leaders who only robbed official ships but did not kill the poor for twelve generations, who are the bandits? In 1952, the last group of lake bandits in Yuanjiang was eliminated. The millennium of lake bandit troubles has ended. But some things sank to the bottom of the lake and could never be retrieved.