When her son is kidnapped, the inventor of a time machine teams up with multiple versions of herself to rescue him.

The unveiling of Dr. Jacob Pendelton's newest product, Shampube becomes a blistering catastrophe when it transforms the Slutton residents into "humping" zombies. Now it's up to an infomercial king, a used car salesman, four stoners and an array of peculiar townsfolk to join forces and stop the invasion.