This film is composed entirely of footage not used in the original documentary that was shot at the Beale estate in East Hampton.

The Beales of Grey Gardens gives greater insight into the simultaneously contentious and loving relationship between the mother and daughter, as well as their relationship with the young caretaker, Jerry, their multitude of cats, and Lois Wright, a friend who briefly appeared in Grey Gardens at the celebration of "Big" Edie's birthday.

It includes a dramatic scene of a small fire in the second floor hallway of the mansion, which explains the large hole in the wall shown in the first film.

Several scenes depict "Little" Edie discussing her relationship with her father, which she described as difficult; the importance of the Catholic Church in her life; the Republican Party; the renovations done to the mansion following the raid; the title of the original documentary; and the loss of several boyfriends in World War II.

This explains "Little" Edie's constantly changing wardrobe in the original Grey Gardens.