Luke Skywalker, a young farmboy on Tatooine, is thrust into the struggle of the Rebel Alliance when he meets Obi-Wan Kenobi, who has lived for years in seclusion on the desert planet. Obi-Wan begins Luke's Jedi training as Luke joins him on a daring mission to rescue the beautiful Rebel leader Princess Leia from the clutches of the evil Empire. Although Obi-Wan sacrifices himself in a lightsaber duel with Darth Vader, his former apprentice, Luke proves that the Force is with him by destroying the Empire's Death Star.

Luke Skywalker and Obi-Wan Kenobi, accompanied by R2-D2 and C-3PO, enter the bustling spaceport city of Mos Eisley, a hive of scum and villainy, in search of a pilot to fly them to Alderaan.