Ben Fogle leads a team of first-time adventurers on a trek along the infamous Black Cat Trail in the jungles of Papua New Guinea. They face deadly snakes and sheer ravines as they trek to the golden sands of Salamau Beach on the Pacific Ocean. It's the final day of the expedition and Ben and the team must navigate the mighty Francisco River. First, they must get non-swimmer Sarah across, then build a raft that can withstand the river's currents.