Katherine Johnson, a woman of means living in Troupville, GA, in 1861, keeps a diary of her isolation and sorrow. Frantic to make sense of the workings of her own mind and haunted by the confines of her estate, she struggles with a husband gone to war, a population migrating away from her and the volatile times she lives in. Slowly succumbing to the toxins of the psyche or a poison of her own design, she is a woman wrought and desperate to tightly grasp at any shred of solace.