I am intrigued by the whole concept of transhumans and posthumans. I am fascinated and terrified the same time by the technology, the possibilities, of this dynamic interplay between humanity and technology. Some call this singularity, but there is no reference of this in the story.
Nexus is a street “nano-drug” that allows people to run software in their brains and connect telepathically. There are some who want to improve it. There are some who want to eradicate it. And there are others who just want to exploit it.