Vance was just about the fiercest, most murderous, coldly quiet killer Ranger Jim Hatfield had ever come across. Already, in a perfect ambush, Vance's gang has massacred 50 Mexican pack-train drivers outside of Brewster. Then they killed one man too many - a Texas Ranger, a friend of Hatfield's. Bent on revenge and on uncovering a wily plot by Vance to sell off Aztec treasure, Hatfield rides into the mountains of the Rio Grande. Now it will be a duel of giants.