Three friends return to school after vacation, and their lively camaraderie collides with school rivals and mischief. Episodes range from a runaway automobile rescue and class contests to pranks, a mad bull encounter, and outdoor revelries such as nutting parties and bonfires. A thread of mystery appears in lost letters and a robbery, prompting one boy’s clew and a tense sequence including fire and an exciting capture. The episodic chapters blend humor, danger, and youthful resourcefulness as the boys confront rivals, solve problems, and restore order by the story’s conclusion.