Mu Ci, a "problem transfer student" came to Nancheng No. 1 Middle School. He wore worn-out sneakers, held a lollipop in his mouth, was at the bottom of his grades, and loved to cause trouble. He looked like a devil in the world. No one knows that under this carefree skin, there is a secret undercover identity arranged by the police - he was ordered to investigate a shocking case involving drugs and school loans.
The mastermind behind the scenes was actually Lin Xiao, a model student from the next class with a nice smile and a well-off family. On the surface, the other party is a top student in the eyes of the teacher, but secretly he controls the underground trading network, and even his own brother becomes a tool.
Testing by wearing shirts in the cafeteria, dunking on the court to establish his power, sneaking into the evidence collection late at night, pretending to be a rich second-generation undercover inner circle... Mu Ci disrupted the enemy's layout with a series of outrageous operations, dancing on the tip of a knife. He not only has to maintain his "school bully" persona to hide his identity, but also collects irrefutable evidence to tear off the mask of hypocrisy. He also has to deal with Lin Xiao's pressure and temptation.
From campus to off campus, from laboratories to private clubs, this battle between good and evil is intensifying. Mu Ci not only wants to uncover the huge evil force behind Lin Xiao, but also protects the students who are being coerced, and has to repeatedly jump on the edge of exposing his identity. When the live broadcast of the incriminating evidence of the school anniversary party resounded throughout the audience, and when the deeper shady story of "Qiming Education" surfaced, this undercover battle had just begun...
