Newcomer Xu Xinglan unexpectedly travels back to ancient times and becomes intertwined with her assassination target, Yuwen Yan, the second young master of Anjin City. Their relationship ignites a thrilling cat-and-mouse game of love and rivalry. Harnessing her modern sensibilities, Xu Xinglan embarks on an extraordinary journey, evolving from the "first female assassin" to the "first female official" in Anjin City.