Join our adventurous Submarine Boys on an extraordinary day filled with unexpected twists! Jack Benson finds himself summoned by a mysterious German Professor at a hotel, while Eph Somers is approached by a suave French Chevalier. Both men have a singular request they want the Submarine Boys to lend their talents to their respective countries. However, as we soon discover, our heroes are fiercely devoted to their nation! (Ann Boulais)