In the 1990s, three good friends lived in a small city on the north bank of the Yangtze River. They were the siblings Dunzi and Niu'er, and Dunzi's good friend Yanjing. They rode to and from school together every day, ran around and had fun together. In the days when the red and white machine was popular, Dunzi and Yanjing spent a lot of pocket money and time in the game hall, and Niu'er stood guard for them. Happy times are always fleeting. On an ordinary morning, Yanjing disappeared from the lives of the brother and sister, and went to another city with an agreement to decide the outcome of the game with Dunzi. Over the years, the three of them have their own lives and troubles. Yanjing was rejected by the job search everywhere, and his girlfriend also threw herself into the arms of the director. In the end, he bowed to reality and joined his father's company to live a business life of toasting and drinking; Dunzi opened his own game store, but his hobby was just a cheap consumer product in the eyes of others. They always miss the good old days...