A brother and sister go up a rocky hill to explore a cave while their parents do some nasty things in the car. The kids go missing, and the parents go into a panic until their children reappear. But … these aren’t the children that went up the hill, are they? Oooooooh! Writer-director Adrian Garcia Bogliano delivers some decent creeps with this stylish mixture of sexual terror and devil-speak. The kids he has cast are genuinely spooky, while the parents (Francisco Barreiro and Laura Caro) do a great job of being completely confused and messed up. Bogliano does some interesting things paralleling strange sexual proclivities and indiscretions with Satan. Is Satan really messing with these folks, or are we seeing really crazy people behaving badly? Either way, it’s a genuinely scary time, and Bogliano is a horror force to be reckoned with.