In April 1862, deep in the carnage of the Battle of Shiloh, the youngest Belle brother, Ethan, deserts the Confederate army alongside his older brothers Mason and Archie. Exhausted, wounded, and pursued, the three stumble on a remote homestead tucked beyond a strange creek, tended by a woman named Sarafina and her young son, Titus. Sarafina takes them in, but the fruit is out of season, the clothes fit too well, and the fertile land seems to answer to something older than any of them. As Ethan uncovers a hidden cavern beneath the homestead, the brothers realize their sanctuary may be a trap laid by something ancient and merciless.