In the backwoods of Tennessee superstition reigns and with it blood sacrifice. For decades a cult has worshipped a force that inhabits a pit. Once in a blue moon it demands a sacrifice so that its murky waters can attain healing powers. The cult was established with the first settlers in the area when pox decimated the populace. Years later it has grown to reach the wider community. When Ada learns that she has been selected for sacrifice by the towns preacher who as a potter moulds a jug with the victims face on it, she hides the jug to protect herself and her unborn child who has been fathered by her brother Jessaby. But soon the force begins to kill off members of the town one by one and Ada is faced with the dilemma of fleeing or confronting her fate in this chilling hillbilly horror.