In 1972, Mi'kmaq Annie Mae Pictou Aquash answers a call by the American Indian Movement to go to Wash. to force the government to honour its treat obligations with indigenous people; tensions rise and activists make a unsettling discovery.

Annie Mae risks her life to join a dangerous occupation in South Dakota.The Movement is embraced by Hollywood, the government secretly infiltrates AIM at the highest levels, and Annie Mae makes a dangerous decision in her personal life.

A clash between the FBI and AIM proves deadly; Annie Mae makes a secret pact with a close friend before going on the run with a group of fugitives and then disappears; discovering a body in the Badlands.

After a strange incident, the first Indigenous U.S. Marshallinvestigates Annie Mae'sfate.Evidence leads to threesurprising names. Investigators struggle to find enough evidence to go to trial but then someone comes forward and agrees to wear a wire.