Artist Mark wakes up unable to attend a court hearing important. The reason? The entire building in which it resides is sealed. Blocked all means of communication, it seems that Mark is alone in the building. The cause becomes evident when the men with suits hazamt military tent in the courtyard of the building and also urge residents to remain calm. The silence is shattered when intervention fatal sniper positioned on the roof suggests that nobody will be allowed to leave the area. Realizing that his neighbor is trapped Sergei, Mark will team up with him in an attempt to get out of this situation.