In search for what is pound for pound the hardest pulling fish in the ocean, anglers Mark Martin and Alex Beck set out on an adventure in Mark's home waters off the coast of San Diego, California. Muscle, speed, and adrenaline are the genetic strengths of Yellowfin Tuna, and could they also experience the tug of the elusive Bluefin Tuna on the fly? Join them in their adventure of reel screaming, rod bending, heart pounding action to see if Tuna really can claim the title of the hardest pulling fish in the saltwater world.