When Hank Martin runs into a strange disk complete with little gray men while herding cattle in remote Ogden County, Oregon during the Cuban Missile Crisis, he has to wonder if he's going crazy or if the Russians are invading. Together with his talented cowhorse, Missy, and the support of his wife and local ranchers, Hank is determined to get those cattle rounded up, no matter if aliens, Russians, or weird Air Force bureaucrats want to stop him. Will he succeed in his roundup, or will he lose too many cattle to fund his dreams of raising a line of competitive cowhorses?