In the dead of night, a team of filmmakers prepares to jump into the ocean to film hunting behavior on the reef. But first they must make it through a pack of as many as 50 large and dangerous sharks gathering just below the surface. It is not a dive that many would make. But we are with Howard and Michele Hall, two of the world's leading underwater filmmakers, and with the Halls, something incredible is always just about the happen.
Thousands of sharks - silkies, white tips, black tips, and hammerheads - hunt along the volcanic reefs of Cocos Island, so many that the island has also become known as Shark Mountain. But the waters around this tiny outpost in the Pacific are filled with ocean life so rich and diverse that the island and a twelve mile zone all around it has been designated a Costa Rican National Park and World Heritage Site.
Shot in spectacular high definition video, Shark Mountain takes us along on the underwater journey of a lifetime as the Halls show us the wonders of Cocos, a world they have come to know well. Yet it is a world they see disappearing as the years pass, for even places as remote and protected as Cocos are at risk in today's world.