The narrative unfolds in a stifling county jail where a stubborn sheriff smokes his pipe while a hostile lynch mob gathers outside. The crowd is convinced that Sam Blake murdered a local man named Kittinger, pointing to an open and shut case complete with positive proof and the suspect's rifle found nearby in an abandoned blacksmith shop. Despite his own political ambitions and the immense pressure from the enraged townsfolk, the sheriff refuses to hand over an unconscious prisoner, determined that the law must take its course even if it costs him his life.
As the night drags on, the sheriff's irritation turns into deep suspicion as he analyzes the physical evidence of the crime scene. He notices an inexplicable anomaly concerning the cartridge shells left behind, realizing that two empty casings exist where only one shot should have been fired. This small mechanical detail gnaws at his mind, challenging the supernatural explanations whispered by the superstitious crowd who view the discovery of the culprit as the direct work of divine intervention.
Tensions reach a boiling point as the doctor's arrival is intercepted and the mob pushes closer to breaking down the jail doors. Seeking to reason with the fury outside, the sheriff allows two men, including the victim's vengeful relative, into the building to inspect the situation. When one of the men reveals intimate knowledge of the cell block by making a critical mistake about who is inside, the underlying conspiracy collapses into absolute clarity.
The sheriff realizes that the murder was committed by someone else who framed the drunken and helpless Sam Blake, staging the crime and exploiting the chaotic environment to manipulate public rage. A sudden violent struggle erupts inside the jail as the true killer is exposed, forcing the sheriff to defend his prisoner with absolute resolve. By revealing the logical flaws in the accuser's story to the crowd outside, he successfully defuses the lynch mob and restores the integrity of the law.
