Ben Fogle leads a team of deserving heroes through the uncharted Peruvian jungle on the second leg of his epic South American adventure from the Equator to the Tropic of Capricorn. With no maps to rely on, Ben and his team must chart a course through the unexplored tropical rainforest in a quest to reach sacred Incan inscriptions known as the Petroglyphs of Pusharo. In the final episode of the journey through the jungle, the hard work is rewarded when the team reaches the Cinque Benia river where they must construct balsa wood rafts to take them to their final camp. After the tropical downpours, however, the rapids prove a tough challenge and the precarious river boulders are agony for chef Dave who is suffering from 'trench foot'. Exhaustion threatens to end the expedition but Ben and his team must push on if they want to reach their ultimate goal of the ancient Incan Petroglyphs of Pusharo.