Katô follows Munduruku and allied Indigenous leaders in a decades-long struggle to protect their communities and the greater Amazon. When the government fails to take action, the community undertakes self-demarcation, placing their bodies on the line to protect their territory. At the forefront stands a women-led video collective turning cameras into tools of resistance to document their lived experience of invasion and violence. By reclaiming Katô, the dark black, ancestral soils of the Amazon, the Munduruku affirm the land as a living witness to their history and a source of belonging. Their fight to protect the lungs of Mother Earth is one upon which all life depends.