When Lin Yanqiu, a restorer of modern intangible cultural heritage inkstones, took over the restoration studio of the "Yanxin Pavilion" left by his grandfather, he accidentally discovered a incomplete "Duanshi Cloud Pattern Inkstone" from the Song Dynasty and a "School Inkstone Compass" engraved with inkstone patterns. This ancient inkstone hides the "five-color stone powder code", which is not only related to the recovery of the lost ancient inkstone repair technique "gold powder patching technique", but also connects the time and space passage spanning nine hundred years. With the help of the compass left by his grandfather, Lin Yanqiu established a connection across time and space with Su Moqing, a craftsman in charge of the restoration of the royal inkstone in the Song Dynasty. While cracking codes and searching for fragments of ancient inkstones, the two of them dealt with emergencies in the exhibition of ancient inkstones and the covetousness of cultural relic dealers. In the end, they not only restored the "gold powder patching technique" and protected the thousand-year-old ancient inkstone repair skills, but also gained a deep bond in cross-generational collaboration, interpreting the true meaning of "repairing ancient inkstones is not only to repair the inkstone, but also to preserve the cultural heart and pass on the soul of the inkstone."