A good and inventive single location thriller from South Korea, feeling very much like their version of PHONE BOOTH or similar. This one has all of the political and cultural subtext that makes Korean movies so fascinating, while at the same time it tells a highly suspenseful tale of terrorism and the country's response to it. Ha Jung Woo is reliably good as the lead, essentially doing it all by himself, and holding everything together. Things do get rather preposterous at the climax, in which the CGI budget isn't quite up to the job, but I'm more than happy to forgive it that.