When Red Hawk Dugan and his men attack a small wagon train, Colonel Merriwell is killed and the young girl Isobel taken and raised thinking Dugan is her father. Fifteen years later the Colonel's son Jack arrives looking for Dugan whom he learned killed his father. As he hunts for Dugan he meets and falls in love with Isobel only to then learn Dugan is her father.

Jack Lupton loves three things in the world, Buck his dog, Scout his horse and the lovely rancher's daughter Mary Gale. But his beloved horse Scout was driven off by man's cruelty and finding freedom, now leads a big herd of horses to run wild! And Jack has his own problems with the cruelty of his fellow man, in the form of James Hill his brutal and jealous rival for Mary's affections!

Leaving town with the Sheriff after him, Tex joins up with the Trouble Busters Skinny and Windy. In Placerville he runs into trouble with Bill Jarvis leading to a mad rush to file on oil rich land.

Montana and sidekick Pancho hire on at the Lopez rancho to fight Daggett and his outlaw gang. But Lopez's foreman Barnes is one of Daggett's men and he frames Montana for murder.

Kincade shoots Baird and takes the map to his gold mine. Sutherland finds the dying Baird who tells him the mine's location. Kincade, having lost the map, now goes after the gold Sutherland has taken out of the mine.

Rival logging companies battle for the Valley of the Giants (redwood trees) when a young engineer returns home to help his father by building a new rail line to transport the logs to the sawmill. A romance between the engineer and the rival's niece complicates the situations.