In 1925 legendary British explorer Percy Fawcett ventured into the Amazon, vowing to make one of the most important archeological discoveries in history. He was searching for an ancient civilization, which he had named, the City of Z. With his son, Jack, and Jack's best friend, Raleigh Rimell, Fawcett finally set off into the Brazilian jungle to find the City of Z. Then he and his party vanished, giving rise to what has been described as "the greatest exploration mystery of the 20th. century."