This movie is a sequel/parody of Plan Nine From Outer Space. Plan Nine, by Ed Wood Jr., is known as one of the worst Hollywood movies of all time (Budget: $10800).
My movie will be enjoyable whether or not you have seen Plan Nine. However, as a parody, it's best if you have the background information that was contained in the film.
The following is some background to what Plan Nine was like: Aliens were trying to build an army of zombies. They were trying to prevent Earth from developing "solaronite," which supposedly can destroy the universe.
If you want the details explained to you, Wikipedia has a good sumation at: http://en.wikipedia.org/w iki/Plan_9_from_Outer_Spa ce
Plan Ten takes place just as Plan Nine is ending. It pokes fun at some flaws in Plan Nine, explains some of the bizarre happenings caused by a low budget and poor direction and acting, while adding some of its own original material.