A quantum communications espionage case unexpectedly draws Lin Feng into a covert counterintelligence battle. There are no hailstorms of bullets, only logical gaps in confessions, half a fingerprint caught on surveillance footage, and a grain of quartz sand on a suspect's shoe. With the System's help, he can see the hard evidence behind the lies and break through the maze of true and false intelligence one step at a time. Foreign forces lay traps upon traps, while our side's countermeasures fit together link by link. How can an ordinary student protect his country amid a web of spies?
