Ever see Dredd? Same movie. No seriously. They're almost identical, aside from the inclusion of Dredd and the time period.
A SWAT team invades a local apartment complex to bring a crime lord to justice. He's on the top floor and everything between them and him is an enemy.
This is an Asian movie, so everything is dubbed, and you can expect lots of kung fu fighting.
If you're an action movie junkie, this is worth a rental even if you've seen Dredd.