Luke finds Ben Kenobi, who reveals that he is actually the great Jedi Knight Obi-Wan and has been in hiding since the Clone Wars. Luke asks his Uncle Owen if Obi-Wan might be related to an old hermit named Ben Kenobi, which greatly unsettles him. On Tatooine, Luke discovers the R2 unit and hears the distress call from Leia calling out for help from Obi-Wan Kenobi. Princess Leia, a young political diplomat, plants a distress call on an R2-D2 droid unit, who she then sends in an escape pod to Tatooine before being captured by the villainous Darth Vader. Luke Skywalker is a farm boy on the desert planet Tatooine who hopes to one day become a star pilot and study at the Imperial Academy.
STAR WARS SCRIPT BEAT SHEET STRUCTURE OF STAR WARS: A NEW HOPE Exposition