When an 11-year-old Black girl in Jim Crow America discovers a seemingly worthless plot of land she has inherited is worth millions, everything in her life changes—and the walls begin to close in.

After oil was discovered on their Oklahoma reservation, the Osage Nation became the richest people per capita in the world. Then they began to be murdered off mysteriously. In 1924 the nascent FBI sent a team of undercover agents, including a Native American, to the Osage reservation.