A ranch foreman captures a notorious gang of gold thieves. He ties them up and leaves them for a pursuing posse while he goes out to find the gold they stole. When the posse arrives, the gang's leader convinces them that the foreman is actually the gold thief, and the posse sets out in pursuit of him.
The hero must solve the murder of his benefactor within six months in order to inherit a valuable ranch.
On a mission to discover the identity of the rustlers of the cattle on Britton ranch, Blue Streak O'Neil exposes the villains mingling with the sheriff's posse. Having won the ranch for the heroine, he accepts from her a half interest in it, and also her love.
