Early Reins follows six striking women aboard a train bound for Sunshine Hill in the early 1800s. When the carriage is hijacked by robbers and the soldiers on board are caught off guard, the travelers discover that the ladies are formidable fighters. The story centers on Margarette, a determined young woman who aspires to become a sheriff despite her lack of experience. Throughout the journey, she learns much, and a ragtag group of Western warriors teams up with fellow passenger Spencer to confront the bandits and steer the train to safety.