Luke Skywalker is some guy who runs around with a laser sword, and cuts bad guys in half. He is the one who ultimately ended Freak with the Hood's reign as evil overlord emperor of the Galactic Empire in A Long Time Ago in a Galaxy Far Far Away.
Luke was born in a dessert because his parents have a sweet tooth. But then his parents died because Freak with the Hood killed them. Luke grew up with his aunt and uncle in a desert, and when he was about some age, he ran away after soldiers attacked because he is a spineless coward.
He flew to some place, met Darth Vader, and killed him. Freak with the Hood came, so Luke killed him too. Luke then declared himself emperor of the galaxy. He ruled for three years, but then The Awesome One killed Luke in his sleep.