Bu Bu Jing Xin tells the story of a bustling modern metropolis, where a beautiful and intelligent white-collar woman named Zhang Xiao lives. One day, she had an accident while arguing with her boyfriend, and this incident caused his soul to travel hundreds of years to the Qing Dynasty, where he became a Manchu noble girl named Martai Ruoxi. It was during the Kangxi period, a time when the world was settled and the world was at peace. However, beneath the prosperous appearance, there were hidden currents and murderous intentions.