By order of Emperor Atreides, the Atreides family is moved to Arrakis—a desert planet of terrible storms and giant sandworms, inhabited by cruel fanatics—the Fremen, also known as Dune. This planet is to become their golden tomb.
Why golden? Because this planet is the only source of Spice in the entire universe— the most important substance in the Empire.
Spice, which had geriatric properties, prolonged life; the Bene Gesserit Order used Spice to develop special abilities.
But above all, Spice can only be harvested on Dune. That is why possessing Arrakis promises golden mountains. And the Harkonnens, who previously owned the planet, accumulated large reserves. Now they use all their wealth to destroy their enemies—the Atreides—and reclaim Dune.