After a near-fatal drowning accident, a young boy is miraculously rescued, but his family soon discovers something terrifying—he has become possessed by a legendary demon from the depths of the lake. As the boy's behavior becomes increasingly erratic and violent, the family is thrown into a desperate race against time to save his soul. But the evil entity inside him grows stronger, manipulating and tearing the family apart, leaving them fighting not just for the boy's life, but for their own survival. The battle against the dark forces threatening them will force the family to confront their deepest fears and darkest secrets.