The day his father was imprisoned, Jiang Yu's world was shattered. He sharpened his fists into sharp blades, swallowed the humiliation, and ran back and forth between the campus and the dark streets, just to seek justice. Until Lu Zhi appeared, this sharp-eyed detective was like a stone, smashing into his stagnant life. The confrontation in the interrogation room, the stares at each other during the briefing, and every encounter were like dancing on the tip of a knife. No one knows whether the end of this battle will be hell or light.