This work is AI-assisted. Chen Jiu works in an auction house converted from an old warehouse, meeting people who bring old watches, old books, rocking horses, photos, and diaries one after another. He doesn't only look at the value of objects, but cares about the memories and boundaries behind them. Faced with unsent letters and diaries involving family members, he also insists on respecting the choices of the people involved. As stories are told through one old object after another, Chen Jiu gradually realizes that some things should not just be sold. Therefore, he suspends the auction and organizes the Old Object Story Museum with Xiao Bei. In the end, everyone returns to visit the old objects; old things leave stories, and also reconnect people with the past.