In Gun Runner's Boy, the story begins with Dan Reed, the nephew of the legendary Lone Ranger, arriving in the town of Shady Bend. He quickly finds himself drawn into a conflict involving Jim Hawkins, a boy who is being bullied by a group of local toughs because of his father's criminal history. Jim's father was involved in gun running and was executed, leaving Jim and his mother to bear the weight of his father's actions. Dan, trained in self-defense by the Lone Ranger, instinctively comes to Jim's aid, showcasing his bravery and sense of justice.