Blade Runner is really a masterpiece in the category of dystopian sci-fi novels.
After a nuclear World War 3, planet earth's face has definitely changed to show a dreary, devastated view - for those who still live on the surface of it and have not migrated to an extraterrestrial colony.
In these new colonies, man holds so called "androids", a kind of a biological, genetically engineered and human-like robot, in order to colonize the vast, new landmasses. Gifted with intelligence of human beings some of them manage to escape the bad conditions of colonies' slavery and reach earth in a shuttle.
However, they are not allowed to do so and there are special forces called "Blade Runners" hunting their heads. This is called "retiring an andy".
Rick Deckard is a Blade Runner. Till today, everything has gone right but this time the Rosen Corporation, producer of the recently lanced "Nexus-6" series, has done a damn good job: Rick and his chief officer have their doubts whether they may be recognized from normal human beings by the standard Voigt-Kampff testing procedure. After having met the first exemplar of Nexus-6 types - a young female - Rick Deckard begins to realize that there are feelings of empathy towards it (or is it a her?) surfacing inside him.
Suddenly his persuasions start breaking into pieces...
One should not make the mistake to compare "Blade Runner" the movie and "Blade Runner - Do androids dream..." the book, for they clearly do not cover the same subjects, as neither they cover the same story. Both of them open many philosophic topics. But while the book concentrates on questioning our self-awareness of concepts of human qualities (what makes us different from perfectly functioning machines: intelligence, emotions, religion?), the film more focuses on the subject of mortality and desire for life, although of course there can't be a radical separation of the two.
However, both of them are absolutely worth being read or watched, respectively. "Was ist der Mensch?" Immanuel Kant's demand has not been resolved yet.