South African extreme angler Andy Coetzee has traveled the oceans to reel in the world's largest, most elusive fish. And as we're about to find out, he's willing to do anything, even risk his own life, to catch them. Watch him brave one of the most treacherous rivers on the planet, enter uncharted regions of the Indian Ocean, and dive into the predator-laden waters of Western Africa on his quest to find the Nile perch, the dogtooth tuna, and the giant barracuda -- three leviathans that won't be caught without a fight.