High Noon is about Will Kane, the sheriff of a small town in the New Mexico Territory, who learns a notorious outlaw he put in jail has been freed, and will be arriving on the noon train. Knowing the outlaw and his gang are coming to kill him, Kane is determined to stand his ground. He attempts to gather a posse from among the local townspeople.
When honest ship captain Roy Glennister gets swindled out of his mine claim, he turns to saloon singer Cherry Malotte for assistance in his battle with no-good town kingpin Alexander McNamara.
Wild Bill Hickock (Bill Elliott) and Cannonball (Dub Taylor) help two young people in love (Mary Daily and Stanley Brown) and bring the murderer (Kenneth MacDonald) of Cannonball's father to justice.
When transplanted Texan Bob Seton arrives in Lawrence, Kansas he finds much to like about the place, especially Mary McCloud, daughter of the local banker. Politics is in the air however. It's just prior to the civil war and there is already a sharp division in the Territory as to whether it will remain slave-free. When he gets the opportunity to run for marshal, Seton finds himself running against the respected local schoolteacher, William Cantrell. Not is what it seems however. While acting as the upstanding citizen in public, Cantrell is dangerously ambitious and is prepared to do anything to make his mark, and his fortune, on the Territory. When he loses the race for marshal, he forms a group of raiders who run guns into the territory and rob and terrorize settlers throughout the territory. Eventually donning Confederate uniforms, it is left to Seton and the good citizens of Lawrence to face Cantrell and his raiders in one final clash.
Lin McAdam rides into town on the trail of Dutch Henry Brown, only to find himself in a shooting competition against him. McAdam wins the prize, a one-in-a-thousand Winchester rifle, but Dutch steals it and leaves town. McAdam follows, intent on settling his old quarrel, while the rifle keeps changing hands and touching a number of lives.