She was a monster, sleek and gleaming, designed to strike without warning like the dreaded shark. She was the USS Mako, as fearless and striking as any submarine that ever prowled the blue Pacific. Her objective: look for and damage the hitherto invincible boats of the Japanese Imperial Navy-and revenge the earlier defeats of a long and dirty war.

This is actually the story from the men who pitted their lives against impossible odds in one of the most dangerous branch of the American armed solutions. It is a tale of men pressed towards the breaking stage and beyond in one of the most nerve-wracking, heart-stirring warfare of most. A story of glory, grit, and guts, and of the astonishing resources that human beings call forth when place to the ultimate test.