Xu Xinglan just starts her career but unexpectedly travels back to ancient times and is bound to her assassination target—the second young master of Anjin City, Yuwen Yan! Through a series of twists and turns, they embark on a "catching game" filled with love and conflict. Using her modern mindset, she begins a remarkable journey in Anjin City, transforming from the "No. 1 Female Assassin" to the "No. 1 Female Official."