On the industrial world of Giedi Prime, the sadistic Baron Vladimir Harkonnen tells his nephews Glossu "The Beast" Rabban and Feyd-Rautha about his plan to eliminate House Atreides by manipulating someone in the Duke's orbit to betray him. The Atreides leave their homeworld Caladan for Arrakis, a barren desert planet populated by gigantic sandworms. The native people of Arrakis, the Fremen, prophesy that a messiah will lead them to freedom. Duncan Idaho, one of Leto's loyalists, tells him that he suspects Dune holds vast numbers of Fremen who could prove to be powerful allies.