After escaping the occurrence at WHS Facility 111, called Zombie Day Care, Henry Bawkula and his fiancé', Tori, find themselves under the thumb of the WHS once again, just a few miles down the road. Meanwhile, in Washington DC, two powerful men of the WHS pull the strings of the latest advancement of the XT Formula and initiate another diabolical attack on the lives of those who know too much. However, the WHS isn't without its enemies. From an undisclosed location, another handful of heroes arise and attempt to stop the WHS's from creating a new world order with another Zombie Outbreak. And the zombies, equipped with new technology and the modified XT formula, begin another siege on the occupants of Zombie Rehab. Mindless and merciless, they come.