It's the early twentieth century, and the tragic deaths of her mother and two younger siblings have left Grace Harmon responsible for raising her sister Miriam and protecting her from their abusive father Luther, a zealot preacher with a penchant for speaking in Biblical verse who is on a downward spiral toward insanity.

In the midst of his delusions, Luther believes God has abandoned him and devises a plan to get back into His good graces—a plan that puts both his daughters' lives in danger and unleashes a frenzy of events that threaten to destroy the entire family.

Will Luther succeed in carrying out his crazed plot against his daughters, or will an unlikely hero step in to rescue them all?