Brandon and Kayne are headed to Arnhem Land, Northern Territory, for Kayne's final mission - he must catch, cook and eat an Arafura File Snake. The Arafura File Snake is a rare delicacy in the area, and lives in water - the same water that crocodiles live in! But getting to Arnhem Land, Australia's final frontier, is a mission in itself. It is cut off by floods from the rest of the country for six months a year and Brandon and Kayne arrive too early so their first challenge is getting across the East Alligator River - a croc-infested expanse of water that is not for the faint-hearted. Along the way the mates meet Kakadu locals, Lennie Muraburra and Gregory Koimala, who show them how to make a didgeridoo, and Gunbalanya traditional owners Anne Gumurdul and Gabby Gumurdul, who help them on their mission to track down an Arafura File Snake.