Because Zhou Bingkun and Luo Shibin had a dispute over Nan Zhou, in the process of the dispute, Zhou Bingkun killed Luo Shibin by mistake, which eventually led to Luo Shibin becoming a vegetable.

Zhou Bingkun didn't know that Nan Zhou had gone abroad at the airport, and Nan Zhou kept it from his family. So Zhou Bingkun thought that Luo Shibin had hidden Zhou Nan, so he went to the hotel to ask Luo Shibin to have children.

Luo Shibin didn't tell the whereabouts of Nan Zhou at that time, so they had an argument. Zhou Bingkun also pushed Luo Shibin downstairs because of my mistake, which led to Luo Shibin becoming a vegetable.

Zhou Bingkun was finally sentenced to fixed-term imprisonment 13 years. At this time, Zhou Nan realized that he had done something wrong, so he did not go abroad and chose to study at a university in China. Later, because Zhou Bingkun performed well in prison, his sentence was reduced.

Coupled with the help of Dong Mei's mother, Zhou Bingkun was finally released from prison early. After Zhou Bingkun came home, the passbook he gave to Zheng Juan was returned to Zhou Bingkun intact, and the money in the passbook was not used.