A trip to Busan is about a girl who carries a terrible and infectious zombie virus on the train, and the whole train is in danger. People infected with the virus will attack others and bite people crazily, and the bitten people will eventually lose their minds and attack others. At such a dangerous moment, some people are selfish and eventually harm others and themselves; Some people protect their families regardless of their own danger.

A trip to Busan is a typical Korean realistic film that reflects human nature. The man is the securities fund manager played by Kong You. At first, he was a selfish man who only cared about his own interests. Even when educating her daughter, she was instilled with the concept of "self is the most important". However, just as he was about to take his daughter away, his daughter Xiuan said, "Dad, you always think only of yourself, but you can't see others in your eyes. Mom will leave you." This deeply touched him. At first, he not only cared about himself, but also helped others. He got help from others in the subsequent struggle against the zombie infected by the virus, and then he learned to help others. At the same time, he was saved, and the warmth of human nature was gradually awakened. Although I was finally bitten by a selfish fat uncle and infected, I left a perfect impression in my daughter's heart.

In the middle of the movie, a group of men walked through six cars and had a round with their friends, but the people in the original car didn't believe them and drove them to another car. They also escaped a glimmer of hope behind the dark clouds. I think this also shows that people who are kind to others will be kind.