Shen Buyan, an associate professor at a university, accidentally traveled to the time when "Acacia Cliff" was created. With an obsession to find the historical secrets hidden in "Acacia Cliff" that was accidentally burned due to his work mistakes, he met the author of "Acacia Cliff" - Empress Lu Yuan of the Yuanqi period of the Sheng Dynasty. He embarked on a thrilling adventure to save Lu Yuan's fate by traveling to an earlier time each time. When he stood at the end of the story, her story had just begun. In this reverse time river that was destined to pass by each other, where should the two go? At this moment, the real secret of "Acacia Cliff" finally appeared in front of Shen Buyan...