Behind the walls of the US Naval Academy's massive hundred-year-old stone dormitory, a select community of mice undergo their own rigorous military training program. A tawny-coated mouse named Chester gets the call to serve when his dim-witted cousin accidentally starts a fire by chewing through a wire in the wall. Impressed with the confident, efficient, noble midshipmice who respond to the emergency, Chester vows to join the Naval Mouse Academy. Unfortunately, an injury and a close call with the notorious water rat leave Chester at the bottom of the academy's list of candidates. But with support from his family, including his veteran grandfather, Chester puts in night after night of toilet training (healing his wounds while learning to swim) and barely makes the cut. This charming story follows Chester and his comical nest mates, as well as their unsuspecting human counterparts in the rooms below the rafters, as they endure the rigors of the legendary Plebe Summer. Even though the humans consider the mice pests rather than comrades, they share the same joys and challenges as they overcome adversity, escape catastrophe, and learn life's lessons of friendship, teamwork, leadership, courage, duty, honor, and service to others.