In a stunning move the droid commander General Grievous has landed on Coruscant and kidnapped Chancellor Palpatine who was becoming dangerously close to young Anakin. In an attempt to escape, the Separatist leader boarded the Trade Federation cruiser the Invisible hand and was leaving Coruscant. Swift to action the Jedi Council send a small fleet including two Jedi, Obi-Wan Kenobi and Anakin Skywalker. After successfully entering the hangar the Jedi move to the Chancellor. They are greeted by an unpleasant site. Dooku, and this time Yoda isn't there to save them. Kenobi is swiftly knocked back by Dooku and is trapped. Dooku and Anakin engage in combat. Anakin is stronger this time and cuts Dooku from his lightsaber and in one swift stroke has of with the Count's head. The meeting is followed up by visiting Grievous who sets his electro-staff bearing bodyguards on the pair. After killing the droids they hunt for Grievous. "You lose General Kenobi" he says as he breaks a window and flies out grappling back to the ship and escaping in a pod. After the half destroyed cruiser is successfully 'landed' Anakin returns to Padme and Obi-Wan is on the hunt for Grievous. Meanwhile the Council tell Anakin to spy on the Chancellor who fears an attempted assasination and Anakin is ever edging away from the Jedi Order and closer to the Republic. At the same time Obi-Wan is on the hunt for the droid commander General Grievous. Obi-Wan finds General Grievous in Utapau and a long skirmish occurs which eventually Obi-Wan wins, killing Grievous. Meanwhile on Coruscant Darth Sidious (Chancellor Palpatine) has almost seduced Anakin to the dark side when Skywalker tells the Jedi Council. As a party lead by Mace Windu fight against Palpatine Anakin believes the lies Palpatine has told him and runs to save the Sith Lord he finds him lying defeated buy Mace about to be killed. Anakin runs and cuts of Windu's lightsaber hand leaving him as Palpatine sends him to his doom. Anakin is no more. Only Darth Vader. Palpatine then takes complete control of the senate, turninng it into the First Galactic Empire. Padme watches on and says, "So this is how democracy dies. With thunderous applause." Vader and Obi-Wan confront on Mustafar and Obi-Wan defeats Vader leaving him without an arm or either leg burning. Not wanting to murder and break the code, Obi-Wan leaves Vader. Meanwhile Yoda has gone to confront Palpatine who is to cowardly to face Yoda in hand to hand, knowing he would lose, instead he stands and bombards the Jedi master in a cowardly manner and Yoda is forced to retreat. Padme gives birth to Luke and Leia and then dies, leaving a lot resting in their fate. Meanwhile Vader has been rescued and put in a special suit to keep him alive. the Rebel Alliance, fighting the 19-year-old Galactic Civil War, emerges from a secret Rebel base and finally wins their first victory against the tyrannical Galactic Empire, led by Emperor Palpatine. Princess Leia Organa's ship, the Tantive IV, carrying secret plans to the Empire's superweapon, the Death Star, is pursued by an Imperial Star Destroyer. During the fighting, two droids, the fussy C-3PO and the feisty R2-D2, escape into one of the Tantive's secret corridors. The Tantive is disabled and swallowed up into the enormous Star Destroyer via a magnetic field. Imperial Stormtroopers blast their way into the Rebel ship; when the ship is brought under Imperial control, Darth Vader arrives to assess the damage. Princess Leia records a holographic message and stores it into the memory banks of R2-D2, then disappears as C-3PO arrives to discover his counterpart. The Stormtroopers capture many Rebels, while Darth Vader questions the Tantive's commander, Captain Antilles (C-3P0's and R2-D2's master), about the secret plans. Grabbing Antilles by the throat, Vader demands an answer, but when he is unable to obtain any, the Dark Lord lifts him off of his feet and chokes the Captain to death. While conducting a thorough search ordered by Vader, Stormtroopers discover Princess Leia and capture her. The droids, meanwhile, use an escape pod (which R2-D2 programmed) and begin their journey to the planet Tatooine, a planet in the largely-ignored frontier region. Leia is later brought to Lord Vader for questioning, but when Leia flatly denies being part of the Rebel Alliance, he orders her to be held prisoner, knowing she is now his only hope in finding the secret Rebel Base.
On Tatooine, the droids (after being captured by scavenger creatures called Jawas) come into the possession of Owen Lars and his young nephew, Luke Skywalker, a young, frustrated resident of one of Tatooine's remote settlements. While cleaning the droids, Luke triggers part of a holographic message from a mysterious, attractive woman (Princess Leia). Later, at dinner, Luke suspects that the droids might have been stolen, and that R2 really belongs to an "Obi-Wan Kenobi". Uncle Owen denies it and tells Luke to have the droids' memories erased by morning. In addition, Owen refuses to honor his agreement to allow Luke to apply to the Academy that year and Luke is left frustrated with a bleak future on the farm. Returning to his garage before nightfall, Luke discovers that R2-D2 has escaped. C-3PO suggests Luke go after him, but nighttime is dangerous due to the increasing amount of Sandpeople, so they decide to wait until morning.
Early the next day, Luke and C-3PO enter the Jundland Wastes and find R2-D2, but suddenly Sandpeople appear. While checking out the situation, Luke and C-3PO are attacked by one of the Sandpeople. As the Tuskens ransack Luke's speeder after subduing the farmboy, the sound of a Krayt dragon is heard, scaring off the Tuskens. It is revealed that the sound was made by none other than Obi-Wan Kenobi, now going by the name of "Ben." Ben discovers the unconscious Luke and a partially damaged C-3PO. Luke wakes up and sees Ben, who reveals his true identity and with the pending return of the Tusken Raiders in force to consider, Ben takes Luke and the droids back to his hut.
While Luke repairs C-3PO, Ben tells of his days as a Jedi Knight and the Old Republic and reveals to Luke that his father was one as well. As a token of good faith, the old Jedi hands Luke his father's lightsaber which Luke is able to activate without any difficulty. Ben explains about how the Jedi kept peace in the galaxy before the Dark Times. Luke then asks how his father died. Ben tells Luke he was betrayed and murdered by Darth Vader, a former pupil of Ben's before he turned to evil, then talks about the mysterious energy field called the Force. Finally, Ben and Luke see the entire holographic message from Princess Leia, who asks for Obi-Wan's assistance to take the droid and the plans to the planet Alderaan if the Rebellion is to survive. Ben invites Luke to come with him to Alderaan, but the young Jedi-to-be is reluctant at first citing his responsibilities back home, eventually offering to transport Ben and the droids as far away as Anchorhead to get a transport to Mos Eisley.
On the Death Star, Imperial commanders (including Grand Moff Tarkin) meet to discuss the full power of the battle station, but suspect the Rebels may find a weakness and attempt to destroy it while Tarkin announces the dissolution of the Imperial Senate and the consolidation of the political power under the Emperor with the Death Star enforcing it. One commander dismisses the threat against the supremely powerful Death Star and even dares to insult Lord Vader's caution that its power is trivial compared to the Force. Incensed at the commander's "lack of faith", Vader uses the Force to choke the commander from across the room. Tarkin orders the Dark Lord to stop, and announces his intention to have the battle station fully operational.
Back on Tatooine, Ben, Luke and the droids discover dead Jawas and disorganized Bantha tracks. Ben suspects from the crudely arranged evidence that Imperial Stormtroopers have ambushed the Jawas in an attempt to find the droids and disguised it as a Tusken Raider attack. Luke then realizes that the troopers likely learned who the droids were sold to and heads back to the Lars homestead, but after returning there he finds his family murdered and his house destroyed.
Meanwhile, on the Death Star where Leia is imprisoned, Vader attempts to use an interrogation droid to extract the location of the Rebel base from her. She has managed to resist the interrogation thus far.
Luke returns to the damaged Jawa Sandcrawler. Ben declares there was nothing Luke could have done had he been at the Lars homesteadLuke would have been killed too and control of the droids would have reverted to the Empire. Luke reluctantly decides to join Ben and become a Jedi.
The group then heads off to Mos Eisley Spaceport to find transportation to Alderaan. As they enter Mos Eisley, several Stormtroopers accost the group, looking for C-3PO and R2-D2; however, Obi-Wan uses a Jedi mind trick to convince the Stormtroopers that the droids accompanying him "are not the droids you're looking for". Later, at a seedy bar, after an incident where Ben is forced to cow some toughs with his saber, they encounter a boastful smuggler, Han Solo, and his cohort Chewbacca the Wookiee. Han agrees to transport them to Alderaan with a 10,000 fee in advance, but Ben offers to pay the smuggler 2,000 now and an additional 15,000 later. Solo agrees, and as Ben and Luke head out the door, Han is jubilant about the offer as he owes money to Jabba the Hutt for losing a loadful of spice on an earlier run when he was boarded by Imperial forces. But when he tries to leave the bar, Solo suddenly meets up with one of Jabba's goons, Greedo, who has been looking to collect a large bounty that Jabba has placed on Solo's head (for losing the shipment). Fortunately, Solo takes advantage of the fact that Greedo is foolish enough to allow his quarry to secretly reach for his gun, and shoots him from under th