 11-year-old Davey, whose mother is dead and whose father is preoccupied with his own problems, has retreated into a world of video games and an imaginary hero-pal, the swashbuckling superspy Jack Flack. When an FBI agent about to be murdered slips him a video cartridge containing top-secret data, Davey is suddenly plunged into the intrigue and danger of real-life espionage. No adult believes his story, so he must run a gauntlet of violence and villainy aided only by a younger girl and the encouragement of "Jack Flack" at his side. How long can a comic-book role model guide him through this encounter with reality?