In 1945, the sinking of the USS Indianapolis led to the worst shark attack in human history. The species behind the carnage was the oceanic whitetip, a little-known and elusive predator. Today, its numbers are in decline, and human activity is a big reason why. Join a team of marine biologists and a champion free diver as they set off into the Pacific to track down the little-seen predator, tag it with a camera, and learn more about its hidden life.