During the Iraq War, U.S. Army Staff Sergeant Shane Matthews is a sniper who is sent to investigate a pipeline construction site in the desert of the country, with his spotter, Sergeant Allen Isaac. The pair patiently wait 22 hours on over-watch before determining that the site is clear. Matthews proceeds to investigate the site, but is shot by an Iraqi sniper. Isaac tries to rescue the dying Matthews, but he is also wounded in the right knee and has his radio damaged and his water bottle destroyed in the process..

A wounded soldier awakens in a strange cube that tests his physical and mental limits as he attempts to find a way to escape against a ticking clock.

Two American Soldiers are trapped by a lethal sniper, with only an unsteady wall between them.