1: I Got Blasted to the Past!

Luke Skywalker survived his fight with the Emperor but his father didn't. After the battle of Endor, Luke gets a chance to go back in time and set things right. How will things go down? Will Luke save his father and re-write the future, or will everything happen like before?
(This story is in the process of being posted on Ao3)
Disclaimer: I don't own Star Wars. Lucas FIlm/Disney do.