In the 1940s, Ningxia, Zhongwei County. Although it was a period of the War of Resistance Against Japan, the Japanese army had not reached the central defender. The county's folk customs were simple. Under the governance of the county chief Ma Shoutian, the people could live in peace. Shou Tian was a member of the old Kuomintang who joined the party during the Northern Expedition. He was loyal to others and loved the people like a son. The new police director Ouyang Qing is said to be a close friend of Chairman Ma of the Provincial Government. Within a long time, he arrested a lot of people in the name of traitors and forced torture. Black smoke, the county magistrate knows that Ouyang Qing caught traitors in the name, but actually deal with the Communist Party. He was very dissatisfied and bad. On this day, the central defender came with two special characters. They had fallen into the trap of Ouyang Qing design and were locked in the prison of the police station. These two people, one is Ma Youlan, the biological daughter of the county chief, and the other is the son of the county chief. Ma Youlan has been going to college in Chongqing. He returned to his hometown and became a doctor in the hospital. And Tong Sanquan has gone in these years, what he did, no one knows. In fact, Ma Youlan and Tong Sanquan are like Ouyang Qing, and they have their own special mission. Their fate is entangled in this place in Shapotou ...