James Gray’s newest film The Lost City of Z has quietly become a hit with critics and Gray devotees ever since debuting at last year’s New York Film Festival. It’s about to hit theaters here, and its newest trailer, while the briefest look we’ve gotten of it so far, shows off the immense scope of what looks like a modern movie that dreams of being an Old Hollywood epic.

At the turn of the 20th century, there were still unmapped parts of the world that had yet to be conquered. Because one could still be considered an “adventurer” back in those days, British adventurer (with possibly the most British name ever conceived) Percy Fawcett made a fateful trip to the Amazon, in which he discovered a civilization of people who appeared far advanced beyond the public’s understanding of “savages.” The film tells the true story of his repeated journeys into the heart of the jungle, spurred on by his determination and the help of his family and friends.

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Based on author David Grann’s nonfiction bestseller, THE LOST CITY OF Z tells the incredible true story of British explorer Percy Fawcett (Charlie Hunnam), who journeys into the Amazon at the dawn of the 20th century and discovers evidence of a previously unknown, advanced civilization that may have once inhabited the region. Despite being ridiculed by the scientific establishment who regard indigenous populations as “savages,” the determined Fawcett – supported by his devoted wife (Sienna Miller), son (Tom Holland) and aide-de-camp (Robert Pattinson) – returns time and again to his beloved jungle in an attempt to prove his case, culminating in his mysterious disappearance in 1925. An epically scaled tale of courage and obsession, told in James Gray’s classic filmmaking style, THE LOST CITY OF Z is a stirring tribute to the exploratory spirit and those individuals driven to achieve greatness at any cost.

The Lost City of Z hits theaters March 24.