The merciless dry season has scorched Africa's Luangwa Rift Valley and ignited an extraordinary battle between the king of beasts and their three-ton foes. Here on the banks of a dwindling river, lions and hippos fight for territory along this last source of life, a clash that grows more heated as the water level continues to drop. Enter a world where deadly force meets lethal power, where cubs and calves become collateral damage, and where a bull's fearsome leadership and a mother lion's devotion set the stage for a true-life drama.