Married couple Jim & Ella Merchant set up their single friend Al Schmid on a blind date with Ruth Hartley. The two hit it off and begin dating. A welder, one day at the workplace, Al learns of a friend's enlistment in the Marine Corps and decides to join himself. Al and Ruth have a last date, with Al insisting that she forget about him as he is about to go into combat. However, when Ruth goes to meet his departure train, he is overjoyed and gives her an engagement ring. Assigned to Guadalcanal, Al and his squad are tasked with preventing the Japanese from breaching their line. During a night attack, many of his fellow Marines are slain, but Al ends up single-handedly saving the day, killing scores of Japanese. However, he is wounded by a suicide bomber near the end of the the battle. At the hospital, Al learns that he is blind, a condition that persists even after surgery.
