In the Arizona desert, Professor Gerald Deemer is experimenting with growth hormones in the hopes of finding a way to increase the world's food supply. His partner in the project was recently found dead in the desert, suffering from a disease that normally takes years to advance but, in his case, seems to have afflicted him in only a few days. The local doctor, Matt Hastings, is puzzled by the strange case and, with Deemer's recently arrived (and very pretty) assistant, Stephanie Clayton, tries to figure out what is going on. When cattle remains are found in the countryside, evidence points to a giant tarantula as the culprit. Written by garykmcd

Two brothers, Ben and Clint, join a cattle drive from Texas to Montana. While heading for Texas they save Nella from the Indians, and she decides to ride with them. Ben and Nella start to get romantic, but Ben isn't ambitious enough for her, and she soon meets up with the boss of the cattle drive. Will she make the right choice, and, more importantly, will the cattle make it to Montana !