In C city, S province, an evil action is unfolding around the national treasure leading pearl. In the case that the whereabouts of the Night Pearl are unknown, the police launched a protracted confrontation with the black and evil forces "Yulong Banner", and the task force even found an internal official moth, and at that time C City was in a state of fear.

Lin, a gangster who has lived at the bottom of society for a long time and suffered from congenital gender malformation, was passively involved in the whirlpool of waves under the instigation of "Yulong Banner". On the second day after accepting the investigation task, a sudden car accident woke Ben Yulin. After a rebirth-like plastic surgery, she returned to her true gender and bid farewell to the man's body. She officially changed her name to Lin Ximin, and the subsequent bloody case made her unable to stay out of it.

Suffering from the unfair treatment of fate, Lin Ximin 19 years' inherent male consciousness and her own growing environment make her new life still bleak and full of unspeakable and unavoidable sufferings. With the inexplicable tragic death of his partners and a heart of revenge, Lin Ximin entered C University of Science and Technology and vowed to trace the truth to the end. Isolated and even in danger, she met Nie Yang, an international student with a special background, and Zhou Kai, an excellent policeman whose newborn calf is not afraid of tigers, entangled in black and white. In the process of self-reconstruction, the huge iceberg about the night pearl gradually surfaced.