In the waters just off Seal Island in False Bay, South Africa, great white sharks are hunting and attacking Cape fur seals and putting on an awesome acrobatic display. Anchored just off the island, a special crew from National Geographic is trying to capture the holy grail of marine photography; a great white predation on a seal, from the shark's perspective. It's a technological and physical challenge that takes brains, bravery and a boatload of luck, where putting one foot in the wrong place can mean the end of that foot.