The Korubo live deep in the Brazilian Amazon and carry a reputation few outsiders survive to describe firsthand: neighboring tribes and colonists call them the "head crashers," a name earned by their use of heavy clubs against intruders. This film follows a crew that spends years trying to get close enough to film them, an effort that stalls until the tribe's leader, a woman named Maiaá, falls sick with malaria and the crew's medicine helps pull her through. That crisis becomes the opening the cameras needed. What follows is unscripted daily life rather than reenactment: an electric fish hunt using stunning techniques passed down through generations, children playing in the village clearing, and the ordinary rhythm of a group that has spent decades fending off loggers, missionaries, and disease. The footage is presented as the first sustained access anyone has gotten to Korubo domestic life, and the film treats their wariness of outsiders as earned rather than exotic.