Bill Markham (
Powers Boothe) is an engineer who has moved to
Brazil with his family to work on a large hydro-electric dam. The film opens on Markham, his wife Jean (
Meg Foster), his young son Tommy (William Rodriguez), and his daughter Heather (Yara Vaneau) having a picnic on the edge of the jungle, which is being cleared for the dam's construction. Tommy wanders from the cleared area, and an
Indian (Rui Polanah) from one of the
indigenous tribes known as the Invisible People notices Tommy and takes him. Markham pursues the pair into the forest but does not find his son. Ten years later, the dam is nearing completion. A 17-year-old Tommy (
Charley Boorman), now called Tomme, has become one of the Invisible People. When his father, Chief Wanadi, the man who took and adopted Tommy, notices Tomme is now smitten with girls, he initiates Tomme's coming-of-age rite, after which Tomme undergoes a
vision quest. Tomme's
spirit animal tells him he must retrieve sacred stones from a remote spot deep in the jungle. Wanadi warns him that the quest will be dangerous, as it will take him into the territory of the cannibalistic
Fierce People. Meanwhile, Markham has finally identified his son's abductors. Markham and a journalist (
Eduardo Conde) decide to set off bottle rockets to attract the attention of the Invisible People. Instead, they attract the Fierce People and are captured. Armed with a
CAR-15 carbine, Markham is able to defend himself long enough to talk with Chief Jacareh (Claudio Moreno) who releases Markham for the night, promising to hunt him down in the morning, while the Fierce People kill and butcher the journalist. Close to dawn, Markham stumbles into Tomme collecting the sacred stones. The two recognize each other just as the Fierce People arrive, striking Markham in the arm with an arrow. Tomme and his father manage to escape, leaving Markham's carbine behind. In the care of the Invisible People, Markham recovers from his injuries and discovers that his son has chosen a wife, a young woman named Kachiri (
Dira Paes). Jacareh, recognizing the destructive power of Markham's carbine, visits a seedy brothel at the edge of the construction zone and arranges to exchange women for ammunition and more guns. Wanadi presides over the wedding, with Markham seated in honour next to the chief; Markham watches as Tomme and Kachiri are wedded; he is still grief-stricken, even still upset with Wanadi, for his son being taken; Markham asks Chief Wanadi why he took Tommy all those years ago. Wanadi answers that he had thought the white people must be terribly unhappy, since they were destroying the forest, but Tommy had smiled at the Invisible People when he saw them; the Chief says he had taken Tommy to save him. Wanadi gives Markham the herb to instigate Markham's own vision quest, and he wakes up back at the dam's construction zone. Tomme and his friends return to their village to discover that many of the Invisible People have been murdered and all the young women abducted by the Fierce People. Tracking the Fierce People, they find their women inside a building protected by unfamiliar, and deadly, technology. In the ensuing battle, the Fierce People kill several members of the Invisible People, including Chief Wanadi. Desperate for help, Tomme navigates the city to his parents' condo, and Markham agrees to help rescue the women from the brothel. That night, Markham initiates a shootout in the brothel while Tomme and his friends release the enslaved women from captivity. The Fierce Ones arrive to fight the Invisible People, but are defeated with Markham killing Chief Jacareh. Tomme is later sworn in as the new chief of the tribe. Markham warns Tomme that the almost-completed dam will end the tribe's way of life, but Tomme insists that the Invisible People are safe and they will ask the wildlife to bring on sufficient rain to break the dam. Markham does not trust that the dam can be broken with any amount of water that the animals can bring, so he decides to "help" the cause and destroy the dam himself. During the storm, Markham places demolition explosives at key points along the dam, but just as the detonator fails from a falling piece of equipment, the water breaches and destroys the dam, just as Tomme had insisted could happen. Markham watches its destruction with mixed emotions. The film ends with Tomme and Kachiri sitting at the swimming hole near their village in the jungle, watching the members of their tribe splash about and play. ==Cast==