Ling Xiaoce, an ordinary history graduate student, was accidentally transported to Shanghai in 1936 by a strange pocket watch while sorting out a dusty archive of the Republic of China. He found himself involved in an undercurrent concerning the direction of history. His only reliance is the pocket watch that allows him to "rewind" time briefly, and his knowledge that is far beyond this era. In order to survive and find a way home, he must use his own advantages to work step by step in this changing era, unlock the secrets of the pocket watch, and correct the historical "abnormalities" that may lead to future collapse.
