Tragic mother and son

Han Sumei is a very unfortunate woman. During that turbulent year, she wandered alone to the northwest countryside. The kind-hearted mother Wu took Sumei home. Unexpectedly, her son Wu Jinwang, an old bachelor who was not successful, raped Sumei. Soon Sumei found out that she was pregnant and had to marry Jin Wang. Later, his sons Yongnan and Yongqiang were born one after another, but Jin Wang still indulged in eating, drinking and having fun without caring about his family. The couple quarreled and fought every day. Sumei wanted to divorce several times, but she finally made do with it for the sake of her children and her mother-in-law's pleas. Zhao Dalong, a blacksmith who repaired farm tools, came to the village. This enthusiastic and capable young man sympathized with and loved Sumei, and the two came together. There were some rumors in the village about the relationship between Sumei and Dalong. After Jin Wang heard about it, he beat Sumei so hard that he fell ill in bed. Under Sumei's persuasion, Dalong left the village. Jin Wang died of illness. Dalong came after hearing the news and proposed to Sumei. Sumei was going to take her children and move to the town with Dalong. Yongnan refused to go with her and begged her mother not to leave, but Sumei still followed Dalong. This suddenly caused the relationship between Yongnan and his mother to become alienated and cold. More than 10 years later, Yongnan, who has graduated from college, has grown into an outstanding pathologist. He is determined to find out the truth about his father's death.