Inasmuch as western star Charles Starrett gained screen fame as the Robin Hood-like "Durango Kid", it stands to reason that Starrett would head the cast of Robin Hood of the Range. The star plays Steve Marlowe, the foster son of railroad manager Henry Marlowe (Kenneth McDonald). When it becomes apparent that the railroad is using underhanded methods to drive local homesteaders off their land, Steve adopts the guise of "The Vulcan", a legendary champion of justice.

In this western, a lonesome cowpoke trots into a town and helps clear his pardner's name. The trouble began when the friend was framed by the leader of the Cattlemen's association who made it seem like he was a rustler. Because the friend was an ex-con, the evidence against him seems airtight. The wandering hero must work extra hard to prove his friend's innocence.