A quantum communication theft case accidentally involved Lin Feng in an anti-espionage secret war. There was no hail of bullets, only logical cracks in the confession, half a fingerprint in the surveillance, and a grain of quartz sand on the sole of the suspect's shoe. With the support of the system, he saw the ironclad evidence behind the lies and solved the puzzle of true and false intelligence step by step. Foreign forces are setting up traps layer by layer, and our countermeasures are linked to each other. How can an ordinary student protect his country in the Bourne Supremacy?