In 755 AD, in Chang'an on the eve of the An-Shi Rebellion, Chen Yan, a graduate student in the history department, accidentally traveled through time due to an epitaph from the Tang Dynasty and became the owner of the frail young owner of "Chen Ji Shu" in the south of the city. At that time, the Tang Dynasty was peaceful on the surface, but in reality, Yang Guozhong was in power, An Lushan was gaining momentum, and crises were everywhere.
With a dead smartphone and handwritten notes in hand, Chen Yan started by resolving the loan sharking crisis in a book store and revitalized his business with modern business thinking. He accidentally got involved in a secret fight in the court. He got acquainted with Li Mingyue, the daughter of Hexi Jiedushi, and interacted with literati such as Li Bai and Du Fu. He witnessed historical nodes such as the Maweipo Incident and the fall of Tongguan, and struggled to make a choice between "accommodating history" and "protecting relatives and friends." During the ten years of troubled times, he grew from a stranger in a foreign land to a man of the Tang Dynasty who respected his cultural heritage and protected his relatives and friends. Finally, in the recovered Chang'an, he guarded his library and loved ones and found his place in the troubled times.
