A beginning is a very delicate time.
Know then, that is is the year 10191.
The known universe is ruled by the Padishah Emperor 
Shaddam the Fourth, my father.
In this time, the most precious substance in the universe 
is the spice Melange. 
The spice extends life. The spice expands consciousness. 
The spice is vital to space travel.
The Spacing Guild and its navigators, who the spice has 
mutated over 4000 years, use the orange spice gas, which 
gives them the ability to fold space.
That is, travel to any part of the universe without 
moving.
Oh, yes.
I forgot to tell you.
The spice exists on only one planet in the entire 
universe.
A desolate, dry planet with vast deserts.
Hidden away within the rocks of these deserts are a 
people known as the Fremen, who have long held a prophecy 
that a man would come, a messiah, who would lead them to 
true freedom.
The planet is Arrakis, also known as Dune.