A band of young naval lads embarks on a global cruise aboard a battleship, encountering a string of episodic adventures that mix shore-side escapades and maritime peril. Early episodes feature daring rescues and social encounters in port cities; at sea they face violent storms, a shipboard fire, and a mysterious craft, while one youth experiences solitary confinement. Later stops lead to volcanic islands, archaeological outings near pyramids and tombs, and several narrow escapes before the squadron completes its return voyage, with chapters emphasizing action, camaraderie, and naval life.