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 unexplored tropical rainforest in a quest to reach sacred Incan inscriptions known as the Petroglyphs of Pusharo. Scout leader Steph is suffering from extreme heat exhaustion and Ben decides that the only option is to evacuate her out of the jungle on a stretcher. This means the team must retrace their entire route from the previous day putting their chances of reaching the Petroglyphs in jeopardy. As the team race to make up lost time, it is prison governor Abi who is next to feel the heat.