The corpses of the recently-dead are returning to life and attacking the living, devouring their victims. In the big cities there is nowhere to hide.

When two members of a Philadelphia S.W.A.T. unit decide to escape the city with two friends, the four take flight in a traffic helicopter. However, when the gas starts to run low, they must land on the roof of a mall now occupied by the living dead.

Armed with weapons, the four humans manage to secure the mall through a series of brutal battles with the living dead creatures.

Will the besieged four escape the bandits and the grisly flesh-eating zombies?