Please answer the following question: Build a movie plot around this: What does the sheriff tell Hansen? that several more spider hills have been located on Colby's property.
A:
Robert "Rack" Hansen (William Shatner), a veterinarian in the rural town of Verde Valley, Arizona, receives an urgent call from a local farmer, Walter Colby (Woody Strode). Colby is upset because his prize calf has become sick for no apparent reason, and brings the animal to Hansen's laboratory. Hansen examines the calf, which dies shortly afterward. Hansen tells Colby he cannot explain what made the animal so ill so quickly, but takes samples of the calf's blood to a university lab in Flagstaff.A few days later, Diane Ashley (Tiffany Bolling), an arachnologist, arrives looking for Hansen. Ashley tells Hansen that the calf was killed by a massive dose of spider venom, which Hansen greets with skepticism. Undaunted, Ashley tells him the problem is serious and that she wishes to examine the animal's carcass and the area where it became sick. Hansen escorts Ashley to Colby's farm. Moments after they arrive, Colby's wife, Birch (Altovise Davis), discovers their dog is dead. Ashley performs a quick chemical test on the dog's carcass and concludes that like the calf, it died from a massive injection of spider venom. Hansen is incredulous, until Colby states that he recently found a massive "spider hill" on a back section of his farmland. He takes Hansen and Ashley to the hill, which is covered with tarantulas. Ashley theorizes that the tarantulas are converging together due to the heavy use of pesticides, which are eradicating their natural food supply. In order to survive, the spiders are joining forces to attack and eat larger animals.Hansen and Ashley return to the Colby farm. As the scientists and the Colbys are walking past a barn, a bull stampedes out; it is being attacked by tarantulas. Ashley notes that the spiders likely will not be afraid to attack people either. Colby douses the spider hill with gasoline and lights it on fire, seemingly destroying the spider menace. However, many of the spiders escape out of a tunnel. Colby is attacked in his truck the next day, sending it over the side of a hill and...