The story is a novel of an orphan who becomes a detective and investigates a murder. The murder occurs among three groups of genetically enhanced humans. If I remember correctly one group dies, one group commits suicide, and the last group is where the investigation takes place. I believe its one of this group who is murdered. This group are geniuses and the detective is seduced/fascinated by a new art form invented by this group or the group who committed suicide. I can't remember much else.