In the savanna-woodland of Fongoli, Senegal, a community of chimpanzees is doing things primatologists rarely see elsewhere: fashioning spears from sticks to hunt bushbabies, and, according to researcher Jill Pruetz, tolerating and even using fire as it moves through their habitat rather than fleeing it. Pruetz has tracked this group for years, and the film follows her observations of their tool use, their hunting parties, and the social bonds that hold the troop together in an open, hot landscape unlike the dense forests where most chimpanzee studies happen. Footage shows the animals stripping and sharpening branches, moving in coordinated groups, and navigating terrain that forces behaviors closer to what early hominins may have faced. The comparison to human ancestors runs through the film's spine: if chimpanzees adapt this way under savanna pressure, it suggests something about how our own lineage may have picked up similar tools and strategies. The Fongoli site itself, and the question of what pushes primate behavior toward tool use, is the film's real subject.