In 1956 five American families faced the most violent tribe in the Amazon. Their journey of understanding has inspired millions around the globe. Micayani is born into the most violet society ever documented by anthropologists, the Waodani tribe in the rainforests of Ecuador. As the grows he learns what every Waodani understands – he must spear and live or be speared and die. Mincayani’s world changes when he and his family kill five Christian missionaries, who had set out to reach the brutal tribe. This incident propels Mincayani’s family group down an extraordinary path that culminates in them departing from the violence they’ve only ever known. Nate Saint’s son Steve was a boy when his father and friends were killed. He returns to the Waodani as an adult and together, Steve and Mincayani realise what Nate accomplished in his death, enabling them both to lead new lives – as their families live together, side by side.