Mangzi is a little tracker in Qinghe. Qiaoqiao likes Mangzi's lightness and hard work, so he marries Mangzi, who comes from a poor family, regardless of his family's objections. After the marriage, the couple falls in love, the family is happy, and a smart son is going to kindergarten. It is almost a perfect day, but no one knows that because of the things in bed, Mangzi never likes to wear a condom, so the tragedy begins. . . .