The heroine was originally a little girl wandering on the streets of Haicheng, but because of her ability to control space, she became a street tyrant in this Haicheng where ordinary people are everywhere. One evening when she was ten years old, when she tried to rob a passerby, he used the same space manipulation to counterattack her. She was later adopted by the passerby and named Lin Yafei.
In the days that followed, Lin Yafei lived a life that a normal girl should have under the care of her adoptive father. At the same time, her adoptive father, who had mysterious powers, trained Lin Yafei's space manipulation ability door-to-door, turning her into a master of space manipulation.
The year she graduated from college, Lin Yafei returned to Haicheng from the mountain town where she went to school, only to find that her adoptive father was missing, leaving behind only the family house and a very ordinary sapphire necklace.
In order to find her missing adoptive father and explore her own life experience, and of course more for the money, Lin Yafei and her friend Fu Xiaoxue, who knew about her supernatural abilities, teamed up to run "Qibao", a private detective agency that walks within the boundaries of the law. They use "information worth exchanging" or high commissions to solve problems for clients that cannot be solved through normal channels.