Two young boys on a camping trip are killed by extremely aggressive rattlesnakes in the desert. Then, a family farm is attacked, including all the animals. A local college professor, Dr Tom Parkinson (Sam Chew) is hired by the sheriff's department to investigate when more people are attacked. He's paired with a woman photographer, Ann Bradley, and they interview a pilot who had landed his plane in the desert and was bit and nearly killed. Their investigation leads them to the nearby Army base, where they learn that soldiers have been attacked. It's all because of a nerve toxin buried in some nearby mines-which have made the rattlers aggressive. This film came along around the same time as the other killer animal movies-GIANT SPIDER INVASION, THE PACK, DAY OF THE ANIMALS. It's okay. What makes it less effective is that it's clear all the rattler footage was shot completely separately than the rest of the film and edited together to make it seem as if they're a threat.