Hao Huanxi, a young girl, was deeply influenced by her dead police father Ren Hao and decided to become a people's policeman. During her four years in the police academy, she established a deep friendship with her classmates, especially Mei Qiu. In an accidental KTV audition, Huanxi and others were involved in a drug trafficking case that the police had been investigating for a long time. The suspect was arrested but suddenly died in prison, and the clue was interrupted. They learned that this drug trafficking group was controlled by a mysterious person code-named Clivia. After graduation, Huanxi and others joined the police station and became members of the drug trafficking investigation team. During the investigation, I was glad to find that my father, Ren Hao, was involved in the case. All kinds of evidence show that her father was a traitor undercover, and she had a nervous breakdown and fell into a trough. Inspired by leaders and colleagues, he rejoiced, rallied and determined to clear his father's name. After everyone's efforts, Clivia was captured. This man is Uncle Ni Kun who raised Dongbao. The protracted drug trafficking case was finally solved, which proved Ren Hao's innocence.