A group of survivors take refuge in a shopping mall after the world is taken over by aggressive, flesh-eating zombies.
John Quincy Archibald is a father and husband whose son is diagnosed with an enlarged heart and then finds out he cannot receive a transplant because HMO insurance will not cover it. Therefore, he decides to take a hospital full of patients hostage until the hospital puts his son's name on the donor's list.
In the future, medical technology has advanced to the point where people can buy artificial organs to extend their lives. But if they default on payments, an organization known as the Union sends agents to repossess the organs. Remy is one of the best agents in the business, but when he becomes the recipient of an artificial heart, he finds himself in the same dire straits as his many victims.
