When programmer Ark was debugging the system late at night, he accidentally discovered that the company's "user experience optimization" backend contained a black database that illegally stole citizens' privacy. Tens of thousands of names, addresses and even biometric information were being packaged and transmitted. He immediately submitted an objection report, but was prevaricated by the technical director as a "system bug." Turning around, he discovered that his work card permissions were restricted, his computer was remotely monitored, and a strange car was following him on his way to get off work. Fangzhou secretly copied the evidence and prepared to report it anonymously, but was blocked by security guards in the computer room on the night of copying. The company accused him of "stealing business secrets," posted his personal information on an untrustworthy platform, and forged chat records to frame him for colluding with overseas institutions. Desperate, Fang Zhou hid in an old Internet cafe and contacted Su Xiaoxiao, a police detective from the Economic Investigation Detachment. However, on the eve of the meeting, he received an anonymous threat - if he dared to show up, his paralyzed mother would be immediately "removed" from the designated hospital. Faced with the risk of being hunted, Ark used a tracking program he wrote to lock the flow of data, and teamed up with Su Rui to set up a virtual transaction trap. Finally, at the scene where the company transmitted core data to overseas forces, he wiped out criminal gangs, including insiders, and guarded the digital borders of countless users with justice.