An illiterate Mexican-American believes he is signing papers certifying the health of his sheep when, in fact, his "X" now marks the spot on a deed selling his ranch to a couple of land-grabbing dudes. When the sheepherder's son is killed by the crooks, Clay investigates and learns that the pair has been conning simple folk out of their property throughout the Southwest and determines to put the men out of business permanently. (thetvdb.com)