A war veteran takes a new job in Lawton, Okla., but the fresh start that he and his brothers decide to make together turns nightmarish when a malignant demon known as the Zozo enters the picture.

When Stephen Richards is executed for the murder of nine people in 1879, it seems his reign of terror is over. But when the Pracht family moves into their new home in the empty plains of Nebraska they discover he has only just begun.