At Towers & Smythe Consulting, an insidious virus known as ID-7 is discovered, which is notorious for removing the inhibitions of those it infects, leading to uncontrollable impulses and a lack of moral compass. Derek Cho, a disenchanted employee who feels wronged by the company's cutthroat corporate environment, becomes infected with the virus. As the infection spreads rampantly throughout the office building, the entire structure is placed under a government-sanctioned quarantine. Inside, the chaos mounts as infected employees give in to their baser instincts, turning the workplace into a frenzied battleground of every person for themselves.

Amid the mayhem, Derek crosses paths with Melanie Cross, a client who has her own score to settle with the corrupt executives of the firm. With the building sealed off and law enforcement unable to intervene until the quarantine period ends, Derek and Melanie decide to team up. They set their sights on reaching the company's top executives to settle their grievances, having to navigate through a melee of violence and hysteria. As their devious foes leverage the situation to their advantage, Derek and Melanie must use their wits and bravery to fight through a gauntlet of white-collar anarchy, all the while combatting their own emerging ID-7-induced impulses.