Dune (1984 film) characters Lady Jessica
Plot
In the far future, the known universe is ruled by the Padishah Emperor Shaddam IV. The most valuable substance in the empire is the spice melange, which extends life and expands consciousness. The spice also allows the Spacing Guild to fold space, allowing safe, instantaneous interstellar travel. The Guild forces Shaddam to clarify a conspiracy that could jeopardize spice production forever. Shaddam reveals that he has transferred power and control of the planet Arrakis, the only source of the spice, to House Atreides, but once the Atreides arrive, they will be attacked by their archenemies, the Harkonnens, and Shaddam's own Sardaukar troops. Shaddam fears the Atreides due to reports of a secret army that they are amassing.
Lady Jessica, the concubine of Duke Leto Atreides, is an acolyte of the Bene Gesserit,  an exclusive sisterhood with advanced physical and mental abilities.  As part of a centuries-long breeding program to produce the Kwisatz Haderach, a mental "superbeing" whom the Bene Gesserit would use to their advantage, Jessica was ordered to bear a daughter but disobeyed and bore a son, Paul Atreides. Paul is tested by Reverend Mother Mohiam to assess his impulse control and to her surprise, passes.
The Atreides leave their homeworld Caladan for Arrakis, a barren desert planet populated by gigantic sandworms. The native people of Arrakis, the Fremen, prophesize that a messiah will lead them to freedom. Duncan Idaho, one of Leto's loyalists, tells him that he suspects Arrakis holds vast numbers of Fremen who could prove to be powerful allies. Before Leto can form an alliance with the Fremen, the Harkonnens launch their attack. Leto's personal physician, Dr. Wellington Yueh, who is a Harkonnen double agent, disables the shields, leaving the Atreides defenseless. Idaho is killed, Leto is captured, and nearly all of House Atreides is wiped out by the Harkonnens. Baron Harkonnen has Mentat Piter De Vries kill Yueh with a poisoned blade. Leto dies in a failed attempt to assassinate Baron Harkonnen using a poison-gas tooth implanted by Yueh in exchange for sparing the lives of Jessica and Paul.
Paul and Jessica survive the attack and escape into the deep desert, where they are given sanctuary by a sietch of Fremen. Paul assumes the Fremen name Muad'Dib and emerges as the messiah for whom the Fremen have been waiting. He teaches them to use Weirding Modules — sonic weapons developed by House Atreides — and targets spice mining. Over the next two years, spice production is nearly halted. The Spacing Guild informs the Emperor of the deteriorating situation on Arrakis.
Paul falls in love with young Fremen warrior Chani. Jessica becomes the Fremen's Reverend Mother by ingesting the Water of Life, a deadly poison, which she renders harmless by using her Bene Gesserit abilities. As an after effect of this ritual, Jessica's unborn child, Alia, later emerges from the womb with the full powers of an adult Bene Gesserit Reverend Mother. In a prophetic dream, Paul learns of the plot by the Emperor and the Guild to kill him. When Paul's dreams suddenly stop, he drinks the Water of Life and has a profound psychedelic trip in the desert. He gains powerful psychic powers and the ability to control the sandworms, which he realizes are the spice's source.
The Emperor amasses a huge invasion fleet above Arrakis to wipe out the Fremen and regain control of the planet. He has Rabban beheaded and summons Baron Harkonnen to explain why spice mining has stopped. Paul launches a final attack against the Harkonnens and the Emperor's Sardaukar at Arrakeen, the capital city. Riding atop sandworms and brandishing sonic weapons, Paul's Fremen warriors easily defeat the Emperor's legions. Paul's sister Alia assassinates the Baron Harkonnen. Paul confronts the Emperor and fights Feyd-Rautha in a duel to the death. After killing Feyd, Paul demonstrates his newfound powers and fulfills the Fremen prophecy by causing rain to fall on Arrakis. Alia declares him to be the Kwisatz Haderach.
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