Wang Xiaoya, a trainee lawyer who firmly believed in law and justice, died "accidentally" because of exposing a hypocritical scumbag. After waking up, what she faced was not heaven or hell, but a thousand-year-old demon named Yin Luo.
Yin Luo wanders around the world, making a living by sucking "luck", both good and evil. She gave Wang Xiaoya a new life in exchange for signing a contract to help her collect the luck of a thousand "villains" or "destined ones".
Wang Xiaoya, who was forced to become the Great Demon's agent in the world, discovered that her life had already been quietly arranged by Yin Luo - she passed the legal exam and entered the law firm just to get closer to the "prey" selected by Yin Luo. From the scumbag senior who uses love to defraud, to the top stars who use magic to steal the luck of their fans to reach the top... Under the glamorous city, there is greed and sin that ordinary people cannot imagine.
Yin Luo's purpose is always unclear. Sometimes she seems to be seeking justice, and sometimes she coldly satirizes Wang Xiaoya's "naivety". In this cold transaction, Wang Xiaoya not only has to face all kinds of "inhuman" existences and strange urban rumors, but also has to constantly examine her own bottom line and principles in the process of executing tasks: When the darkness that cannot be touched by the law is judged by "inhuman" power, is this a kind of justice or a more cruel plunder?