At first, Erika Bolstad knew only one thing about her great- grandmother, Anna: she was a homesteader on the North Dakota prairies in the early 1900s before her husband committed her to an asylum. As Erika's mother was dying, she revealed more. Their family still owned the mineral rights to Anna's land - and oil companies were interested in the black gold beneath the prairies. Desperate to learn more, Erika set out for North Dakota. What she discovers is a land of families trying their best to eke out a living in an unforgiving landscape.