Luo Qing Chuan, a modern-day history enthusiast, accidentally travels back to the Qing dynasty during Emperor Kang Xi's reign. Thrust into a fierce power struggle among the emperor's sons, she finds herself torn between the affections of the gentle eighth prince, Yin Si, and the ambitious fourth prince, Yin Zhen. As court intrigue deepens, Luo Qing Chuan must rely on her sharp mind and knowledge of history to survive — only to discover that real history is far more dangerous and heartbreaking than she ever imagined.