Poncha Spring sinks its roots in the blood of an abominable slaughter of Pawnees that happened ten years earlier! The founders of the town, the notables and the sheriff are united in the criminal pact initialed with the rich James Gettinger, who has built his villa precisely on the Native Americans’ cemetery. Arrived in town to shed light on the end of Nachite and Labbro Tagliato, who as a child had witnessed the bloodbath, Tex and Carson investigate the shady affair. One of the butchers, Bilding, Nachite’s employer, is made to “commit suicide” by the hands of his own partners, afraid that he will blurt out everything in an attack of remorse…