Emperor Frederick IV of House Corrino is desperate for the harvesting of the valuable drug melange (also known as 'the spice'), only found on the planet Arrakis, to pay off all of his debt incurred on internecine wars with family members. To achieve this, he now offers the sole governorship of Arrakis to the House (Atreides, Harkonnen, and Ordos) which delivers the most spice for him. War begins as deputations from all three Houses arrive on Arrakis.
The Emperor has proposed a challenge, to each of the houses: "The House that produces the most spice will control Dune. There are no set territories, and no rules of engagement." Vast armies have arrived. Now, three Houses fight for control of Dune; The Noble Atreides, The Insidious Ordos, The Evil Harkonnen.