In Smithville, Texas, the teenagers Brian, Abby, Travis and Danny are classmates of the Smithville High School and best friends. One day, they are reading Macbeth for a class and they decide to investigate the rumors that the house of the mortician Ely Vaughn is haunted by ghosts. They see shadows in the upper window and they break in the house to see what is happening and they see a corpse lying on the bed; however, they are surprised by Ely that kills Danny, pushing him to fall off the staircase. Nobody believes in the teenagers since Ely is a respectable citizen, but Travis and Abby decide to prove that the undertaker is a psychopath. Will they be successful in their intent?

When an American oil company sets up an experimental drilling plant out in the vast deserts of Mongolia, they awaken a nest. The deadly creatures begin to breed and spread, devouring everyone in their path. The only person who can stop them is treasure hunter and adventure seeker who spent his life searching for a legendary tomb, fabled to be protected by the Death Worms. He knows he must do what he can to kill the creatures, but stopping these monsters may mean destroying his life's work forever!