They received their warrior baptism on the same day. They are a Cheyenne and a Skidi Pawnee, irreducible enemies, therefore; but Courageous Strike and White Horse, these are their names, are strangely related by an identical sense of honor and courage. They will prove this, years later, during a tense and complex peace conference, in which, in addition to the Pawnee and their allies, a delegation of Navajos led by Tex and Tiger Jack, Ben Lushbaugh, the capable Indian agent of the Pawnee reserve, the army and the combative team formed by the tribes federated with the Cheyennes will also take part. However, the speeches and proclamations are followed by war actions on both sides and the climate, at the confluence of the Loup Fork and the Platte, where Agent Lushbaugh resides, quickly heats up. The danger mounts unstoppably, and for the Dolan family, the settlers that Tex escorted there, the journey to the west risks turning into an inexorable condemnation... Under the leadership of Frank North, the Skidi Pawnee of White Horse manage to overcome their enemies, the Cheyenne of Courageous Strike. The clash between the two valiant warriors reaches a bitter conclusion. Bitter, but not definitive... Meanwhile, the balance in the region, many years after those events, has changed: the white settlers who benefited from the courage and loyalty of the Pawnee have not repaid the Indians with equal money, indeed they make no secret of considering them an annoying obstacle on the path to progress. All North has to do is call Tex, Carson, Kit and Tiger to help, to reunite, together with White Horse and his brother Volpe Ardita, a handful of brave men who can face the risk of a new and bloodier massacre... The trap destined to wipe out the Pawnee is ready to spring. The unscrupulous Indian agent Quayle who, with Sheriff Bolton, is in the pay of the merchant Dutronc, is determined to start an incident in which to involve the soldiers led by Captain Dantrell, resorting to the spirit of revenge of Courageous Strike. But things will be different. In Loup Fork, the trial administered by Judge Whitby to shed light on the attempted murder of Frank North turns into an indictment against Volpe Ardita and the young Dolan. Tex, Carson and North barricade themselves in the Dolans' emporium to face the attack of the sheriff's men, while, on the Pawnee reserve, where Little Hawk and Tiger Jack are, an unprecedented alliance is formed, in the name of honor and loyalty...