In the century-old alley of "Qinglan City", Lin Wan opened a small shop called "Shiguang Old Object Shop". She has a secret that no one knows - when you touch old objects, you can see fragments of the owner's past. One day, the gentle architect Gu Yu brought a rusty copper pocket watch into the store, hoping to repair it. This pocket watch actually allowed Lin Wan to see the farewell scene between Gu Yu's great-grandmother and a mysterious man, and the pocket watch was a token of love between the two. As they repaired the pocket watch, Lin Wan and Gu Yu discovered that their families were inextricably linked decades ago, and both were related to the "protective renovation" storm that the ancient alley was about to face. While they unearth family secrets through old objects and restore the truth of the past, they unite with neighbors in the ancient alley to fight against developers who want to destroy the original appearance of the ancient alley in the name of renovation. In this process, the two went from strangers to familiarity, from fighting side by side to having feelings for each other. In the end, they not only protected the historical features of the ancient alley, but also made up for the family's regrets, and allowed the warm memories of time to be passed on forever.
