Steve continues his adventures in Venezuela to reach the summit of a totally unexplored mountain. Back on the rock after his fall, the team climb right into a mysterious cave which contains the bones of unknown animals. After one more night on the cliff face Steve eventually becomes the first person ever to reach the summit. He finds a lost world with frogs never seen by science and undertakes an epic night of moth, bug and bird surveys culminating in the discovery of a new species of mammal.