The Andaman Islands sit in the Bay of Bengal, home to indigenous groups who have avoided sustained contact with outsiders for millennia, some violently rejecting any approach by boat or helicopter. Sailors' folklore long painted them as cannibals; this film follows anthropologists and geneticists testing that reputation against DNA evidence instead. The genetic analysis traces the islanders' ancestry back to Africa, with researchers estimating a split from mainland African populations of over 100,000 years, making them one of the oldest continuously isolated human lineages studied. Cameras get access to daily life in the forest habitats the islanders depend on for food and shelter, showing hunting methods, shelter-building, and small physical details researchers note, like the islanders' short stature and dark skin, that fuel debate over their origins. Scientists interviewed lay out what the genetic record can and cannot prove about ancient human migration out of Africa. The cannibalism stories get addressed directly and dismissed as sailors' myth rather than treated as open question, with the film's weight resting instead on what the DNA actually shows.