The first part of the movie involves a going away party for one of the main characters. Some drama occurs but everything is interrupted by what seems to be an earthquake. These opening scenes sort of drag on, and contain a lot of bland dialogue. But once the action gets going, the movie gets pretty intense.
The usual locations are involved, including subway tunnels and abandoned buildings, but everything is done with some neat special effects and a lot of style. I enjoyed this movie, but found myself slightly let down after a really mysterious preview.