While out scouting Duke finds Angie Matthewson, Flint's foster mother, near death. After staying with her overnight, Duke running late returns to the train to get Flint. Before she dies, she asks Flint to find her son Artie, with whom Flint has never gotten along. Angie tells Flint Artie is in the boom town of Richfield Diggings. Flint arrives to find the sheriff's posse returning with a dead body and he receives a very cold reception from everyone. Eventually a bartender lets Artie know a stranger is looking for him. Artie is busy with his girlfriend Melanie Sanders who is concerned about Artie's safety and the conflict between him and her foreman, Nick Fears. Artie sends the sheriff to bring Flint to him. Flint crosses paths with Melanie before meeting Artie and learning he has been elected mayor. Flint tells Artie that their mother has died while asking for Artie. It becomes apparent that he is up to his old ways hiring gunmen to enforce his rule but the businessmen and people of ...