William Boyd returns in the 25th of 66 Hopalong Cassidy adventures. This time Hopalong goes undercover to expose a group of ranchers who are interfering with the building of a new railroad. Also, look for Russell Hayden as Lucky Jenkins, and Britt Wood as Speedy McGinnis. It's a great, action-packed adventure from director Leslie Selander (Flight to Mars, Riders of the Range), and further proof that no one pushes Hoppy around and gets away with it!