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Paladin (Richard Boone) is hired by the family of wealthy Mexican Don Esteban (Hans Conried) to return the aging aristocrat to his hacienda. Now in his dotage, the eccentric Don Esteban is laboring under the delusion that he is Don Quixote, and has dashed off into the wilderness to tilt at windmills and rescue fair damsels. Also interested in the old man's welfare--but for entirely mercenary reasons--is an unsavory character named Dirty Dog (Robert Carricart). Like many another episode of Have Gun, Will Travel, this one is largely location-filmed at Lone Pine, California.