When a small research plane carrying a group of science students and their professor crash-lands in the middle of nowhere, the survivors go to a nearby farmhouse to look for help but soon find themselves besieged by giant mutant spiders.

Video geek Shep uncovers a 135 year old videotape on which mad scientist Artemis Winthrop displays a machine he's invented, which he believes can bridge dimensions. With his buddies, Shep tracks down the machine despite warnings of Winthrop's great-granddaughter, a wiccan named Amelia. Shep restores the machine and while video taping it in action, a horrible accident transforms him into the ultimate tapehead (while unleashing killer bugs from another dimension and a few walking corpses along the way).