To stop the villains, we have to track down this dead bad guy on this desert planet who Luke lost track of who was actually just dead in a cave slightly underground from where Luke lost track of him to retrieve an ancient Sith dagger and then go to another planet to get it translated to learn to go to this other planet where the fairly intact wreckage of the completely obliterated Death Star II is to discover the ancient dagger was actually a pointer device that when held up to the eye at the right spot on a particular cliff facing a certain part of the wreckage it will point to the very intact ruin of the Emperor's throne room on the unfinished Death Star II which secretly had a secret room to the side containing a device that can be used to find the location of a fourth planet where the reborn Emperor and his unnamed Sith have been building a secret giant army of Death Star Star Destroyers which can't function independently in any way in order to take over the galaxy, just as the Emperor planned all along when he was Emperor of the galaxy.
Everybody got that?