Once an Outlaw is part one in the coming together of three outlaws, at different points in their lives and careers.
Most of the action takes place in and around a growing Negro settlement somewhere in northern Montana during the late eighteen hundreds. In the midst of gun play, bank robbing, and kidnapping is the beginning of a love story and the start of trying friendships.

Caine Fuller is an exceptional looking man as well as a gifted gunman and reluctant outlaw. His journey over the years leads him from Texas, where his name was made, to Montana. In a way, it is his last stop. He can't go any further and he refuses to go back, especially, after meeting the smart and beautiful, adventurous, Veronica Murray. Even though things are a bit difficult, they quickly fall in love. Caine's enemies are on his trail and because he wants Veronica, he decides not to run, but face any threat head on. Amazingly, Veronica proves to be a woman experienced with trouble. It is obvious to the female population that she has something in her past, yet Caine doesn't question the integrity of the woman she seems to be.