The Monster Fish crew venture deep into the Amazon in this episode to fish for predatory Wolf Fish with a local tribe. The Xingu River system in southern Brazil is as dangerous as it is remote. Joe joins adventurer Ian at the invitation of a tribal chief, one of the only people able to navigate this thick jungle. Guarded on the banks of the fabled Dragon Lake, the pair cast lures for colourful Peacock Bass, nibbling Piranhas and the veracious Wolf Fish. But while the villagers prepare dinner, the local predators begin to surround the anglers as they wade through the murky depths.