Tristan and Vanessa journey to the remote and magnificent Cocos Island. The world's largest uninhabited island offers dramatic and unparalleled beauty - mountain ranges, lush tropical beaches and hundreds of cascading waterfalls. But it is in the seas surrounding the islands that Vanessa and Tristan have their mission. Diving into these waters is guaranteed to raise your pulse. High-voltage, adrenaline pumping action, is what you get when you drop into the water to film schooling hammerhead sharks. Tristan and Vanessa are here to film this extraordinary event when hundreds of sharks appear out of the vastness of the Pacific Ocean to congregate off this island. Basing themselves on a hi-tech live-aboard boat, armed with expert crew, Vanessa and Tristan will dive amongst hundreds of white tipped sharks, huge manta rays, pods of dolphins, vast schools of jacks, as well as the awesome hammerheads. Tristan gets to grip with a rebreather, a piece of diving equipment which is totally new to him but will allow him to stay underwater for longer periods of time, increasing his chances of witnessing this exciting behavior. But to his frustration, all he sees are sharks swimming down out his reach and scuba can only take them so far. Time for Tristan and Vanessa to switch to a mini sub in order to follow the sharks into the deep. Back on dry land, Tristan and Vanessa unexpectedly run into a Costa Rican fishing boat and get an insight into what it's like trying to actually survive as a fishermen. Sharks, unfortunately, fall victim to indiscriminate fishing practices which has had massive impacts on their numbers. Sadly these animals are now in decline. Tristan and Vanessa are there to capture on film this extraordinary event and to highlight the plight of the Hammerhead sharks.
—Tigress Productions