In his quest to save the worlds big fish, conservation biologist Zeb Hogan traverses the globe studying fish as large as 440 pounds! Join Zeb on an expedition to the Amazon, to wrangle two unique monster fish. Along the way, see their mysterious world, awesome physical features, strange behavior and the astounding cycle that transforms tiny eggs into mammoth creatures. Zeb uncovers the roles they play in the Amazon ecology and culture, while trying to learn why their numbers are diminishing.