I don't want to give away any spoilers.  Procter works as a Ferryman in Prospera.  Basically when someone's health goes below 15 (they have an implant) they are designated for retirement.  Procter's job is to get them on the ferry so they can go to the Nursery and be renewed.  The population of Prospera seem well off and well fed.  There are support staff from the Annex that are basically the blue color workers who work for them.  They are poor and often starving.  Something seems off and Procter is starting to wonder what is going on.  I don't want to give any plot points beyond this.  Story is decent.  There are some dream sequences that get confusing (but there is a reason).  Perhaps rambling in parts but overall recommend.