Publisher's Synopsis
On the Texas border, in 1887, Texas Ranger David Kingston is sent by Governor "Sul" Ross to the isolated town of Mount Hermon. Kingston is to investigate a series of murders and disappearances of Mexican citizens, in particular to search for Maria Calderon, the missing niece of a Mexican general who is threatening to invade to find her. In the town, preacher and mayor Abraham Brant - the man who killed Kingston's father in a "Helena Duel" knife fight in 1866 - is keeping all the townsfolk in some kind of fearful grip. When Kingston arrives in town, the townsfolk act cold and hostile towards him, with the exception of Brant, who is smitten by Kingston's wife, Marisol.Kingston hides his identity and purpose from Brant, appearing as a wandering traveler. Brant offers him the role of town sheriff, which the newcomer hesitantly accepts, hoping the position will cover him long enough to carry out his real investigation.While Kingston explores the town and investigates the nearby Rio Grande for bodies, Brant manipulates a weak-spirited Marisol into becoming dependent on him. Marisol becomes Brant's willing consort, and betrays her husband's secrets. Kingston eventually learns Brant's secret - that he is abducting Mexicans to serve as prey for rich foreigners to hunt.When Kingston confronts Brant and the townspeople, Brant's son Isaac challenges Kingston to a "Helena Duel" knife fight. During the fight, Kingston is badly wounded before he kills Isaac. Kingston escapes, and frees a number of captured Mexicans from the remote prison compound, including Maria Calderon. Suffering from his knife wounds, Kingston hits Brant in a shootout while near the isolated compound, then pins Brant's leg under a boulder. When Kingston passes out, Brant cuts his own leg off and crawls to the wounded man. As he is about to cut Kingston's throat, Maria reappears and shoots Brant dead.