Four true, breathtaking stories of adventure and courage which take us across the ocean, the ice of the Antarctic, the sky and the desert. 'Lost at Sea' tells the adventures of a family sailing round the world and their battle to survive in the ocean after a shipwreck. In 'The Impossible Journey' we follow Sir Ernest Shackleton as he and his men make their way on foot towards the South Pole. The brave young woman in 'Amy Johnson, Woman Pioneer' attempts a heroic solo flight from England to Australia. In 'David Livingstone's Last African Expedition' we meet the great explorer on his last expedition to find the source of Africa's longest river, the Nile.