The cold Lin Wei lives in a small town with the regrets of a bamboo horse. At a funeral, she meets the calm military officer Lu Zheng. One of them hides his worries due to his background, and the other closes his heart due to breaking off the engagement. However, in the running-in of machine tool parts and the warmth of rough paper candy, they slowly take off their guard. In the changes of the 1970s and 1980s, they hide their regrets in their hearts and protect each other in their lives.
