James Gray writes and directs this action adventure adapted from the book by David Grann. Charlie Hunnam stars as British Colonel Percy Fawcett, an explorer who ventures deep into the Amazon jungle in search of a lost city thought to be the home of an ancient civilization. Accompanied by his close friend and fellow army officer Henry Costin (Robert Pattinson), Fawcett leaves behind his wife Nina (Sienna Miller) and embarks on an ambitious expedition to an uncharted area of the Brazilian jungle. After his first trip ends in disappointment and the outbreak of World War One holds up further plans to explore, an ageing Fawcett finally returns to the jungle in the early 1920s with his 20-year-old son Jack (Tom Holland) to continue his search. However, despite being warned that the area they are entering is inhabited by hostile warring tribes, the pair put their lives on the line and press on into the wilderness in one final bid to find the mysterious settlement.