On July 30, 1945, the USS Indianapolis was torpedoed in the South Pacific by a Japanese submarine. An estimated three hundred men were killed upon impact; close to nine hundred sailors were cast into the Pacific Ocean, where they struggled to stay alive, battered by a savage sea and fighting off sharks, hypothermia, and dementia. By the time help arrived - nearly four days and nights later - all but 317 men had died. How did the navy fail to realize the Indianapolis was missing? Why was the cruiser traveling unescorted in enemy waters? And how did these 317 men manage to survive? Interweaving the stories of three survivors - the captain, the ship's doctor, and a young marine - journalist Doug Stanton has brought this astonishing human drama to life in a narrative that is at once immediate and timeless.