The movie is set in the 1970s, during the Vietnam War era, and follows a team of scientists, soldiers, and adventurers as they embark on an expedition to a remote island in the Pacific. The team, led by Bill Randa (John Goodman), a renowned paleontologist, and accompanied by a U.S. Army helicopter pilot, Captain James Conrad (Tom Hiddleston), and a photojournalist, Laura Vail (Brie Larson), aims to explore the uncharted island.