British explorer Percy Fawcett entered the Brazilian jungle in 1925 in search of a lost city that he called 'Z.' He was never seen again. Fast-forward to 1947: Nazi-hunter Gunnar McGuiness and his irascible partner Morgan Grey set out in search of that same lost city... and a treasure beyond monetary value. Why are the Nazis so keen to find this city? Is it purely for gold - or is there something vastly more intriguing? Could Percy Fawcett still be...