When the Carstons' old friend Manuel Quesada arrives in Twin Rifles badly beaten, he gasps out a desperate tale: A Norteamericano and his Indian sidekicks are terrorizing the Quesadas' home in Mexico. It is time for the Carstons to honor a promise they made many years ago. But Wash, now married, is unwilling to risk his life, and Will is busy with his duties as town marshal. Chance is on his own?.

Shaken by his sweetheart's tearful farewell, and apprehensive about the true strength of the enemy, Chance welcomes ex-Ranger Dallas Bodeen to the rescue party. The arrival of young Ike Hadley is another matter: This one seems hell-bent on proving he's as tough as his troublemaking brothers. But every gun will count in this confrontation. And Chance has a compelling reason for returning from this mission -- even though it may mean his days as a rough rider will be over.

On the merciless frontier a man and his sons were Texas Rangers all -- until the Civil War marked the end of their famed rough-riding legion. Now in a land of violence and brutality, scarred by war and uneasy in peace, they've fought rustlers and comancheros, tamed lawless towns, and upheld the Ranger Code.