The year is 1864. Sister Thomas Josephine, an innocent Visitantine nun from St Louis, Missouri, is making her way west to the promise of a new life in Sacramento, California. When an attack on her wagon train leaves her stranded in Wyoming, Thomas Josephine finds her faith tested and her heart torn between Lt. Theodore F. Carthy, a man too beautiful to be true, and the mysterious grifter Abraham C. Muir. Falsely accused of murder she goes on the run, all the while being hunted by a man who has become dangerously obsessed with her.