In the autumn of 1900, outlaw Claude Barbee puts his 'retirement plan' in action, attempting to lead his train-robbing gang across Texas to recover a cash stash hidden after a botched railroad heist.
In nineteenth century Oklahoma, two teen girls, fans of stories about outlaws, are on a quest to meet and join up with them. They find a shadow of a former gang and although disappointed, still try to help them escape from a vigorous Marshal.
Horse breeders Adams and Brock are vying for the Army contract. When Adams is killed trying to ride his horse Trigger, Roy saves the horse from being shot. He trains him and then plans to ride him in the race to win the contract.
Ken not only has to fight with his brother Wally over the girls, he has to try and stop the conflict between the cattlemen and the sheepmen. It gets worse when Butch kills Judy's father.
Profiteer Alexander Stiles lays claim to a million acres of range in the Pecos River country, but a rancher named Claybor stands in his way as he has already claimed the water-rich location of Sweetwater as his own.
After blaming Britt for his wife's decision to stay with the Native Americans who captured her, an abusive husband organizes a party of vigilantes to accompany him into Indian territory.
The mayor has sent for a gunslinger who, though appearing to clean up the town, is really to be the mayor's means of taking the town over. When Roy and Gabby arrive in Tombstone, Roy is mistaken for the gunslinger. Just as Roy is ready to expose the mayor, the real gunslinger shows up.
When his ranch falls on hard times, Cowboy Roy Roger has trouble making his mortgage payment and he takes his song and dance to Wall Street to try to raise cash fast.
As war looms in the Pacific, even cowboys are called on to fight the enemy. Horses are desperately needed by U.S forces stationed in the Philippines, and the Range Busters - Crash Corrigan, Alibi Terhune, and their newest partner, Davy Sharpe - are hired to accompany a herd to the islands. But first they must battle Axis spies right in Texas, as they foil a plot to steal the very horses destined for shipment.
Just after Pocatello's brother is killed, a wounded Pocatello arrives being chased by the Sheriff. Larkin switches the identity of the two brothers and then expects Pocatello to assume his brother's role in the outlaw gang.
Bill travels to a new state after the outlaw Scarface saves him from a lynch mob. There he takes a job on the Barton ranch and joins in the fight against gang leader Larkin. Finding a wounded Scarface he helps him recover. Arrested by Larkin's stooge Sheriff, and with another lynch mob after him, he once again needs Scarface's help.
Near the end of the Civil War, an imprisoned Confederate raider is sent under guard to warn both his men and the Army at Fort Yuma that an impending rebel raid is really nothing but a ruse by scoundrels from both sides, in cahoots to take the fort's gold for themselves during the chaos. Soon he slips his treacherous escort and attempts to complete the mission himself.
One of the 12 Westerns in 12 Months; Travers, a doctor who deserted his military post, searches the frontier for the wife who left him. His quest is thrown off course when he saves Sarah, a woman left for dead after a wagon raid. With the cavalry, the law, and deranged outlaws on their trail, Sarah and Travers set off together to find this missing woman. Heart of the Gun is a psychological thriller and a romance drama wrapped in a gritty Western setting.