The rich mines of Sonora are the prize of a battle of wits and shots between "Tiger" O'Flagherty, master of the supply wagon-train, and Jesse Wilks, secretly the head of a bandit gang which repeatedly robs the train, thinking thus to starve out the miners. "Tiger's" ward, Sally Blake, runs the town's only restaurant. The "Tiger" is wounded by the bandit and his servant writes to his wife, who lives apart from him in Mexico, with his grown son, Don Luis, of whose existence the father is ignorant. The Senora sends the boy to his father's aid. Arriving anonymously, he turns the tables on Wilks in several encounters and falls in love with Sally. Some capitalists are brought in, despite Wilks' opposition, who appraise the mines at high value but will not invest unless wagon-freight service is assured. So on Luis, now known "wenor Daredevil," attacks the train and recaptures the wagon in a battle in which Wilks is killed. leaving Sonora free from his menace, and Don Luis and Sally the opportunity to make arrangements for their marriage.
—Copyright Description from Library of Congress