Luo Qingchuan, a modern-day history enthusiast, accidentally travels back to the Qing dynasty during Emperor Kang Xi's reign. Immersed in the princes' power struggle, she is torn between her feelings for Yin Si, the eighth prince, and Yin Zhen, the fourth prince and future Emperor Yong Zheng. As she navigates the treacherous world of political intrigue, her historical knowledge and wit are crucial for her survival, revealing the darker truths behind historical events.