A group of young office workers plans an after-hours party on the top floor of their high-rise building, eager to unwind with alcohol, music, and secret romantic entanglements. Unbeknownst to them, the seemingly endless work week is about to take a deadly turn. Their revelry draws the attention of Joe Vickers, an unhinged police officer with a murderous vendetta against anyone he deems morally corrupt. As Vickers makes his way to the building, he methodically prepares to bring his own brand of twisted justice to the unsuspecting partiers.

As the night progresses, the fun quickly dissolves into horror when the employees start to disappear one by one, each victim meeting a gruesome end. The remaining survivors scramble to uncover who or what is behind the killings, soon realizing that they are trapped on the top floor with a relentless and psychopathic killer. Frantic attempts to escape are met with terrifying obstacles as Vickers continues his sadistic rampage. Tension mounts as the trapped workers must use their wits and teamwork to evade their pursuer and survive until dawn.