What is this about?

I know my response is being posted long after you've asked this question, and you've probably looked elsewhere to find out by now, but I'll still answer.
This film is based on the play (of the same title) by Tennessee Williams, and basically it is about the existing strife within a family, and how their inability to cope and live harmoniously with one another affects the family as a whole. One of the main focuses is the struggling marriage between Maggie and Brick. Brick is unable to look past his glory days from college, and is he unable forgive his wife for supposedly being involved with his best friend who died several years previously (Brick blames her for his friend's suicide). Meanwhile, Big Daddy (father to Brick and his brother Gooper) has recently been diagnosed with a serious illness, and the family thinks he'll die soon of cancer, I think it was. Biig Daddy plans to leave his major estate and money to one of his two sons after he dies; since the "loser" would have to rely on the other family for financial support, the wives, Maggie and Mae, are constantly going at each other (more Mae, though), trying to stay on Big Daddy's good side so that they'll be left the estate. With all this occuring, the subjects of love (passionate and cooled), father/son relationships, brother/brother relationships, marital strife, &c. are all discussed and explored through Williams' vivid characters.
If you haven't already, I highly recommend you read the play. I haven't seen this version, but the original with Elizabeth Taylor, Paul Newman, and Burl Ives somewhat changes/dodges around the truth of Brick's relationship with his friend (still very powerful, though, to see). This play is one of my absolute favorites, so, if you read it, I hope you enjoy it :)

Why did I write? Because I found life unsatisfactory.
*~Tennessee Williams~*