When young MacGuffin is left wheelchair bound by a horde of drunken Mardi Gras revelers, he devotes his remaining years to one final act of twisted revenge. By performing a ritual that raises Zombie! from his grave to wreak vengeance upon unsuspecting Mardi Gras revelers 23 years later, the adult MacGuffin unwittingly unleashes forces beyond his control and aids a pair of renegade aliens in their own sinister agenda.