After his twin brother is brutally murdered, Zhou Gongxu assumes his identity and infiltrates the mysterious Hu Yuan Bureau to uncover the truth. What begins as a simple quest for revenge quickly spirals into a deadly conspiracy aimed at framing the loyal and eliminating the innocent. Walking a tightrope between two lives, he must navigate the schemes of his calculating foster father and the probing affections of his female colleague, Bai Dieyi. When his mission targets the "traitor" Zhao Ding, everything he witnesses contradicts what he’s been told. A lethal game of power, lies, and loyalty has begun—and armed with his Judge's Brush, he must fight his way out, for himself, for his brother, and for the truth.