Four teenagers encounter a supernatural force during an underground excursion in this spine-chiller. Malik (Edward Furlong), Gen (Cerina Vincent), Barbie (Amber Benson) and Wes (Callard Harris) decide to explore a labyrinth of caverns beneath the Mexican border. But evil awaits them there. As they go deeper, the friends become trapped -- and are set upon by malevolent ghosts determined to pick them off, one by one. Steve Railsback co-stars.