In 2024, the president of the MM manufacturing company "Serano Gene Hybrid" was kidnapped. The murderer who appeared at the ransom collection site escaped after leaving an image of his face with a smiley face logo on all surveillance records. Six years after the incident, the ingenious trap of the "Smiling Man" reappeared in the online society... The long-sealed Smiling Man has awakened, and the peak showdown between the Special A-level hacker and Section 9 is about to begin!