It's about a 1980s, go getting yuppie (played by Christian Bale, who was the kid in Empire of the Sun) who looks after himself, but who also only able to feel any positive emotion when he's killing people and treating others (particularly women) like dirt.
I know it's supposed to be as much a statement about the greed and excess of the 1980s as much as it's about anything else, but I found the story and characters thoroughly unlikeable, with few, if any, redeeming characteristics.