Four friends venture on a grueling jungle expedition to investigate a rumor of giant gold dorado in an uncharted Bolivian river. During their quest they will face torrential rains, deadly insects and uncontacted tribes.

The boys venture to Zambia in search of the large tigerfish, a fierce freshwater predator. During their excursion they are faced with 400 miles of unpaved roads, dangerous wildlife and a very serious lack of fuel.

The boys travel to Mongolia to find the river wolf, a ferocious member of the salmon family. They endure a punishing countryside drive, a treacherous horseback ride on mountain trails and a raft excursion into uncharted rivers.

The boys venture to a remote area controlled by the Dayak people of Borneo. While there, they are prepared to risk it all in order to catch the majestic and mighty mahseer fish.

The boys head to Greenland for an opportunity to fish an extremely remote river believed to hold massive Arctic char. While there, they discover its barren tundra, towering fjords and wilderness that is both pure and unforgiving.

The boys venture to Australia in search of one of the most aggressive fish, the barramundi. While there, Aboriginal guides lead them to Endyalgout island, a barra fisherman's paradise.

The boys venture to the jungles of Ecuador in search of the mighty Arapaima fish. In order to catch these living dinosaurs, they endure intense heat while hacking through bug and snake infested waterways.

The boys head to Papua New Guinea in a bid to catch a giant trevally, which is known to be the world’s greatest sportsfish. They must employ all of their expertise and strength to succeed in this ultimate fishing challenge.

The boys head to Mexico in a bid to catch a tarpon, which is known to be one the world’s greatest sportsfish. In order to catch these creatures they must navigate through a maze of crocodile and mosquito infested waterways.

In the vast brackish maze of mangrove wetlands lies a population of untouched bonefish. The boys journey the tropical West Indies determined to catch these world-class fish.