This formula western stars George O'Brien as a member of the Arizona Rangers, a quasi-vigilante society aimed at ridding the west of lawlessness. O'Brien is assigned to infiltrate a criminal gang in Arizona. For duty's sake, O'Brien must alienate himself with his sweetheart (Laraine Johnson, later known as Laraine Day) and pose as a ruthless bandit. The hero comes awfully close to meeting his doom before the crooks are roped and hog-tied. Arizona Legion represented the 60th screen appearance of veteran action star George O'Brien. ~ Hal Erickson, Rovi