A group of young cadets leave their boarding school after final examinations and head west, where a sequence of linked adventures unfolds. They confront a mysterious miner's message, an explosion, and an accusation that triggers investigations and clashes with hostile men. Episodes move between a mining camp, a wooded trail, and a cattle roundup, and include the disappearance of an associate, a dangerous mountain lion, timber wolves, imprisonment in a cave, escape attempts, and the unmasking of conspirators. Persistent themes are friendship, resourcefulness, and frontier dangers, resolved in a decisive roundup that restores safety.