Clint Walker plays Hardcase, an American soldier of fortune roaming the old west in search of his wife (Stefanie Powers), who has run off with half his life savings. He finds her in Mexico, where she is now the mistress of a rebel leader (Pedro Armendariz Jr.). Hardcase abducts the rebel chief in hopes of getting his money back--thereby winding up in the midst of a deadly political crisis. Alex Karras costars as a myopic associate of Hardcase, who doesn't trust the wife as far as he can throw her. Hardcase was produced by the cartoon firm of Hanna-Barbera, as an effort to break into "live" TV-movie fare.