Nasty villain Jim Parasite is scheming to reduce the world's population to the size of swarming insects, so that he can wrest control over everyone and everything. But two brave and surefooted cowpokes, siblings Luke and Lucy, learn of Parasite's diabolical doings, saddle up their horses, and ride off to Texas together to put an end to Jim's plans. The English version of the film features the voice talents of Billy Ray Cyrus.