The day Jiang Yu’s father went to prison, his world fell apart. He honed his fists into blades and swallowed his humiliation, running back and forth between campus and the shadowy streets, all to seek justice. Then Lu Zhi appeared, a sharp-eyed criminal police officer who crashed into his stagnant life like a stone. Their confrontations in the interrogation room and exchanged glances at a public lecture made every encounter feel like dancing on the edge of a knife. No one knew whether this contest would end in hell or in the light.