It is the future, seven years from right now. In America 20% of the population is addicted to substance D. The drug affects a persons brain and forms a disconnect between left and right hemispheres. Agent Fred is undercover and trying to break up a drug ring but he has starting using Substance D to gain access to the group, things have gotten weird. In fact Agent Fred is a member of the circle but since his brain is operating in two hemispheres he doesn’t even know which one he is. Then there is Nu-Path rehabilitation center that no government official can even get into, so of course they are hiding something…but what? A Scanner Darkly is an excellent book and movie about a paranoid society in the very near future.