Five years ago, Ruan Jingzhu and Guan Jun, two derailed trains, met for the first time in the restaurant of their boss Zou Jianping. A shooting case on the night of the winter solstice caused the two trains Ruan and Guan to go in completely different directions again. Five years later, in a small courtyard house in Panjia Lane, two trains without direction collided again. This time, Ruan Jingzhu met the "perfect man" Kang Bo, and Guan Jun met the "innocent girl" Yan Xiaodan, and their lives gradually began to get on the right track. However……