Carter Andrews embarks on a quest to find and catch the giant white sturgeon, the apex predator in the rivers of the Pacific Northwest; armed with angling knowledge, Carter teams up with local experts to find the mammoth fish he's after.
Deep in the Peruvian Amazon, Carter Andrews searches for massive arapaima, a prehistoric air-breathing fish that can reach weights of upwards of 300 pounds.
Carter Andrews travels to the Gulf Coast to search for legendary alligator gar; starting his journey in Louisiana, Carter tracks down some legends said to haunt the rivers and learns there's much more than meets the eye to these prehistoric fish.