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In 1950, a young doctor, Norton Perina, signs on with the anthropologist Paul Tallent for an expedition to the remote island of Ivu'ivu in search of a rumored lost tribe. They succeed, finding not only that tribe but also a group of forest dwellers they dub ""The Dreamers,"" who turn out to be fantastically long-lived but progressively more senile. Perina suspects the source of their longevity is a hard-to-find turtle; unable to resist the possibility of eternal life, he kills one and smuggles some meat back to the States. He proves his thesis, earning worldwide fame, but he soon discovers that its miraculous property comes at a terrible price. As things quickly spiral out of his control, his own demons take hold, with devastating consequences.