
A loner travels with his horse companion chasing villains across the frontier.

Hoppy, California and Lucky come across bank robbers who drive automobiles; nevertheless, the Bar 20 guys bring the bad guys to justice.

One of Hoppy's Bar 20 ranch hands is tricked into participating in nefarious activities after being subjected to hypnosis.

Three bodies turn up in a frontier hotel; Hoppy solves the murders and chases the killers through unusually misty and dark locations.

Lee Garvin has eloped with the daughter of a railroad man who didn't approve of the marriage; Hoppy steps in when the young man is framed for murder.