IMDB's description is RIGHT on: "During a heist in Russia, a professional thief finds himself dealing with serial killers, insane hostages, double-crossing psycho Russian hardmen and the real possibility of a horrible death."
Seriously, those hostages ARE INSANE! Nevermind the midevilesque ballet dancer with the ball and chain... wtf is going on in that building?!
This has become one of my faves-- the gore is outrageous, the plot and acting is excellent (albeit hilarious) and the end is, well... strange.
Think twice next time you try to heist a creepy business office, think twice. Oh, and check those mystery floors that aren't in use...