A night watchman at the New York Museum of Natural history is thrust thousands of years back in time, where he is forced to do battle with legions of flying female demons that are determined to follow him back to the future, and spread their infernal scourge. Jason Avery (Stephen Baldwin) was protecting an enigmatic obelisk from thieves when he discovered an amulet that sent him back to an era of myth and magic. Embraced as the hero prophesied to deliver a small village from the terrifying creatures that feast on souls and flesh, Jason attempts to use the amulet to return back to his own time. Meanwhile, a scheming scoundrel who has control of the demons has harvested their eggs. Should he succeed in his plan to follow Jason through the time portal, there will be no place to hide from the harpies and their evil master.