The film is about a grumpy old man Walt Kowalski, played by Clint Eastwood, who lives in a run down neighbourhood where most people are immigrants or come from immigrant famlies. He is unhappy with the people in the neighbourhood and his own family. He gets involved with the family next door after the son tries to steal his Gran Torino. It covers many moral issues around religion and racism. It is a great film, made even better by the good storyline.
I give it 5 out of 5, and would recommend you go and see it while it is still on in the cinemas. To find out more about the film including more that you would want to before seeing it try the Wikipedia article. http://en.wikipedia.org/wiki/Gran_Torino_(film)