When Reuben Calthrop shoots an unarmed range-rider because he was bested in a horse race, he starts a chain of events that can only end one way: with spilled blood. Bart Chandler, a farm boy who is handy with a gun but no killer, sets out to avenge the cold-blooded murder of his brother. But Bart is not the first to go after Calthrop, who has cut down many who came looking for retribution. It will take a man who rides tall in the saddle to settle the score. Is Bart Chandler that Tall Rider?