Three years ago, anti-drug police officer Daqi lost his comrade in an undercover operation. Filled with guilt, he lived in seclusion in a small southern town, secretly protecting his comrade's daughter, Xiaodie. Xiaodie was curious about this silent neighbor, but her life took a sudden turn when she was abducted. Daqi's dormant police spirit awakened, and he embarked on a life-and-death pursuit alone. Can he keep his promise to his comrade on this path of redemption?