The Nephilim, an advanced race that ruled the earth millions of years before the evolution of man, return to reclaim their dominion and eradicate mankind. After killing his partner, who inexplicably attacked him during a drug bust, Houston Police Detective Billy Sabbath is sentenced to death row. Wh

The Nephilim, an advanced race that ruled the earth millions of years before the evolution of man, return to reclaim their dominion and eradicate mankind. After killing his partner, who inexplicably attacked him during a drug bust, Houston Police Detective Billy Sabbath is sentenced to death row. When his execution is faked by an above-top-secret U.S. Defense Department operation, Sabbath learns that his colleague's consciousness had been taken over by the Nephilim. Pressed unwillingly into service by the operation's leader, Bluhdorn, Sabbath teams with government agents Levi King and Aly Smith to destroy the Nephilim.