When the Southwest became a part of the U.S.A., law and the principle of equity stood in conflict on the problem of ownership of huge tracts of land, crown grants from the days of Spanish rule. An Irish girl who holds the deed to the largest grant is aided in establishing her claim by the intervention of a shrewd gambler and a susceptible Irish-American lad after a routine series of chases, ambushes, shootings and treacherous encounters with rival factions.