Deep in a secluded forest some illegal tree poachers have found themselves in the sights of a Ranger Emilo (the prolific Jorge Reynoso) nicknamed Jaguar. He takes his forest very seriously, as we see later when he talks to his plants and calls the trees "my babies".
A group of twenty-somethings on a trip to a remote cabin in those very same woods has a breakdown at an abandoned rest stop. While the girls moan that they want quesadillas con papas (good luck with that), the guys run into Jaguar who is handing over what is left of the poachers to the police. All of them are in bad shape, but the leader has had his leg shot off which causes Ceasar (Andrés Bonfiglio of GRAVE ROBBERS fame) to freak out and run to his girlfriend Sylvia (Alejandra Espejo). Si, muy macho.
After a rough night in which Caesar has nightmares of an axe-weilding maniac breaking into the house, Adolpho (Andrés García Jr. who appeared in a few notable horror flicks before going on to 1992s LIKE WATER FOR CHOCOLATE) decides to put on snorkel gear and goof off in the lake. As we all know, snorkel gear is like a red flag to a deranged slasher. When nobody can find him, they naturally are upset that something may have happened to him in the very same lake that Sylvia's mother drowned in. It's got a maldicion de muerte! Jaguar shows up on the scene after the kids try to light up the fireplace with the flue closed (apparently that bundle of kindling produced enough smoke to be seen across the entire forest). Jaguar calmly smooths over the situation by telling the kids "if he drowned, he drowned."
Now, unable to find Adolpho, the weather turns dark and violent and one by one people start turning up dead, but who is the killer? Cue ominous music.