Chen Xi, a graduate student in the Department of History, accidentally traveled to Shanghai in 1928 while taking the last subway train, and was rescued by Lin Muyan, a scholar of the Republic of China. Lin Muyan has been studying the rift in time and space for a long time, and he revealed that Chen Xi did not arrive by chance, but by some inevitable choice. The two explore the mystery of time and space side by side in the turbulent old Shanghai. From misunderstanding to acquaintance, they gradually develop feelings for each other in the crisis. Chen Xi must find a way to return to modern times, and Lin Muyan will face a difficult choice: help her return to the future, or keep her in her own time? This love that spans a hundred years will be tested in the torrent of time and the whirlpool of fate.
