Designated driver Chen Bai refuses to be paid a 30-yuan waiting fee by female car owner Li Ningning, calling the police to handle it. Li Ningning is arrogant and rude, not only insulting Chen Bai, but also suspected of illegal modification, drunk driving and other violations. Chen Bai takes it step by step, using legal weapons to defend his rights, and finally makes Li Ningning pay the price with fines, detention, and driver's license revocation. Li Ningning is unconvinced, posting a video to frame Chen Bai for stalking, which leads to Chen Bai being cyber-bullied, but Chen Bai releases the complete video to reverse the situation, forcing Li Ningning to delete the video, apologize and pay compensation. Just as she walks out of the police station, Li Ningning drives without a license again and is reported once more. This drama shows how an ordinary person uses rules to guard dignity, and the ending is deeply satisfying.