In 1942, after Japan attacked Pearl Harbor in World War II, the United States began to prepare for a large-scale landing operation. The United States Navy was understaffed and poorly equipped, and young people from all over the country responded to the call to join the army one after another. Politics and war brought these different people together. They were sent to a naval training base in San Diego for training. It is such a group of people who finally unite into a courageous collective after experiencing the baptism of blood and fire, life and death on the battlefield. Overcome one difficulty after another and move from victory to victory.