Ex-lawman Harry "Cheyenne" Morgan rides into Durango to discover that his old enemy, Kelton, is about to abscond with savings entrusted to him by the townspeople. Cheyenne decides to stay and joins forces with newspaper editor Anson and a helpless black man, Snowflake. When Anson reveals that Kelton's henchmen have murdered Cheyenne's old friend Woods, leaving his daughter Martha an orphan, Cheyenne goes to offer her his assistance. While she is explaining that Kelton has the papers to her father's gold mine, Kelton arrives. The two men fight but fail to resolve their quarrel, and decide to finish their disagreement at sundown. As dusk approaches, Kelton instructs his men first to bomb the newspaper office, then to blow open the safe where he is keeping the town's savings, but double-crosses them by taking the valuables out and hiding them in Wood's mine. Meanwhile, Cheyenne sends Snowflake to the blacksmith's, where Snowflake overhears Kelton's men planning their attack. Snowflake warns Cheyenne and Anson, who protect the printing press and get Martha to safety before the bomb goes off. Cheyenne heads for Kelton's office and demands Wood's papers. They fight and Cheyenne is knocked out. After Kelton escapes, his men set the explosives, and Cheyenne barely wakes in time to stagger away from the safe before it blows up. Kelton's men follow him to the mine, with Cheyenne and the sheriff not far behind. In a bloody confrontation, Kelton kills his henchmen and starts off with the saddlebag full of valuables when Cheyenne arrives. They struggle on a swinging bridge, and both fall hundreds of feet into the water below. After the posse arrives and kills Kelton, Cheyenne leaves Martha in Anson's care as he heads for Ghosttown.