When Ma Kui caught the thief gang, the thief jumped off the train in order to escape and died, and the accomplice framed Ma Kui because he accidentally killed the thief during the fight, and there were no eyewitnesses at the time, Ma Kui was speechless and was sentenced to 12 years in prison. Ten years of unjust cases, once the truth is revealed. Ma Kui was released and continued to work as a railway policeman, but he had to be a master for the son of the person he hated the most in his life. Because Ma Kui insisted, Wang Xin's father, Wang Yongge, saw the whole process of catching the thief and fighting at that time, and he did not commit manslaughter, but Wang Yongge did not testify to him. 
Wang Xin, who was arrogant and ranked first in his professional performance in school, thought he was a fugitive when he met Ma Kui for the first time, but he was injured by Ma Kui when the two were fighting. Ma Kui hated Wang Yongge, and Wang Xin, who graduated from the police academy, did not accept Ma Kui's discipline at all, and the estrangement between the master and apprentice gradually deepened. On this train from Ningyang to Hacheng, all kinds of people come up every day and leave with complicated stories. Although he was wronged for ten years for no reason, Ma Kui, who returned to the railway police, still did not forget his original intention and worked diligently to protect the lives and property of passengers as always. You must know that at that time, Ma Kui was just a "victim" who had been wrongfully imprisoned for ten years and had just been cleared and released. 
It's normal for such people to have resentment and hatred. There are even people who will embark on the road of no return to revenge on society, but Ma Kui does not. Looking for the lonely old man who lost his daughter day and night, he paid for a train ticket instead of buying a train ticket; He tried his best to help the couple who lost their expensive watches, because of the long-term separation of the two places at work, and the unmarried couple who had conflicts, he patiently comforted the man. Wang Xin couldn't catch the thief, he could see the thief's modification by dividing it by two; Wang Xin can't see the details of life, he can see; Wang Xin can't understand the warmth and coldness of the world, he can understand. But no matter how much he hated Ma Yongge, he didn't spill his anger on Wang Xin. He was strict with Wang Xin, just because Wang Xin was a junior he was very optimistic about, and he even took the initiative to take more responsibility when Wang Xin did not listen to his orders, got out of the car without authorization to chase the traffickers, and was blamed by the leadership. 
However, in the ten years that he was tricked by God, he was not the only one who suffered grievances and pain. His wife Wang Sufang didn't dare to eat meat, and even fell into a chronic disease such as emphysema, and relied on medicine to alleviate the pain for a long time, but she was reluctant to go to the hospital for a good examination, because without her husband to make money to support the family, she had to save money and work hard to raise her daughter Ma Yan to grow up. How Wang Sufang, who has not earned ** over the years, raised Ma Yan, has not been revealed in the play for the time being, but the reason for her emphysema is mostly related to her working environment. 
Daughter Ma Yan had good grades when she was a child, but after Ma Kui's incident, in the past ten years, she couldn't join the Young Pioneers, couldn't join the regiment, and couldn't even choose a class cadre. No matter how hard she studies, her classmates don't play with her, and they all speak ill of her behind her back, including their parents; She didn't dare to go out into the streets, she didn't dare to talk to them; They bullied her and scolded her, she didn't dare to fight back, she didn't even dare to raise her head, except for Wang Sufen and Wang Xin, no one helped her. How much tenacity does a teenage girl need to survive in such an environment and gossip. Ma Kui thought that he was ashamed of his wife and daughter, so he tried his best to make up for it after returning home, and even insisted on letting her take the college entrance examination even when he knew that his daughter was no longer interested in studying. 
But even if Ma Yan is admitted to university, can the family's humiliating ten years be made up for just by winning the college entrance examination? An unjust, false and wrongful case ruined not only one person, but also the entire family behind him. How could Ma Kui not hate Wang Yongge, who he thought was the only eyewitness and the only opportunity to testify against him? Therefore, when Wang Yongge came to Ma Kui for the first time with wine, he questioned Wang Yongge: "Some people obviously saw it and deliberately did not testify to me, and the matter must be clarified sooner or later." At that time, Ma Kui was angry, and Wang Yongge was afraid that he would stumble on his son, so his attitude was ambiguous at that time, neither admitting nor denying it, because he didn't want to anger Ma Kui even more. 
After Wang Yongge left, Ma Kui and Wang Sufen continued to discuss the matter, and Wang Sufen's answer was: "Didn't he say that you were wrong?" ”
Ma Kui soon became unhappy, his wife did not believe in himself, but believed in outsiders, and he firmly believed that Wang Yongge deliberately did not testify against himself. Later, when Wang Xin was drunk, Ma Kui sent him back to Wang's house, and before leaving, he questioned Wang Yongge again: Why didn't you testify against him back then? This time, Wang Yongge gave a clear answer: I was not there back then, you were wrong. Yes, that's the truth. Back then, when Ma Kui was chasing the thief, he did see the train captain's overalls worn by Wang Yongge, but they were just overalls hanging by the train window. 
Because there was a person standing in the car with his back against the car window next door, Ma Kui was running and chasing the thief at that time, and he was dazzled and saw the person standing next to the work clothes and the car window as Wang Yongge. In fact, that person is really not Wang Yongge. As for the person with his back to the carriage, whether he witnessed everything that happened back then, no one knows. Because Ma Kui thought that person was Wang Yongge, he did not find the person near the car window during the investigation, unless they could find that person. But after ten years, in 1968 (the story began in 1978), all walks of life were not developed at that time, and even the ID card was still paper, unlike now, the railway information is all computer entry and record keeping, can that person's information still be found? Ma Kui has never understood why his wife and daughter are all elbowed outward? 
Because in the ten years that he was away, Wang Yongge did not help Wang Sufen with family chores such as repairing the roof, and Wang Xin did not protect Ma Yan, who was bullied, ridiculed, and looked down on by his classmates and other people who did not know the truth. Wang Yongge's care for Ma Kui's family was not out of guilt for not testifying back then, but out of affection for colleagues who had worked together for many years. In the case of the thief's death, Ma Kui was not wrong, and Wang Yongge was not wrong, what was wrong was the gang of thieves who were wronged at will, and Ma Kui's manslaughter, and what was wrong was those investigators who arbitrarily wronged people without careful investigation. In this era, there are many bad people, but there are also many good people, and I hope that there will be fewer unjust, false and wrongful cases like Ma Kui who have been misjudged.