From the Introduction:
In 2088, the Tendril Access Processor connects people to the hyper-real world around them like never before. Peeps don’t just scan at the MEDIA web on an archaic ‘puter—they download it into their brain and see it hover in front of them as a digital overlay of the world.But for all the convenience and connectivity the Tendril Access Processor provides, there are rawbacks, like getting your brain hacked and turned into a pulsing blob of grey jelly.
That’s right, omae. One wrong turn, one misstep in a hack and you could end up a quivering lump of brain dead flesh and bone. If you want to avoid that, you need this Mediafile.