Pietro and Lucia live on an isolated farm with Lucia's youngest sister, Alice. The poor farmers work the land tirelessly every day. Pietro is a strong worker; unlike his three brothers who couldn't participate in the war due to knee ailments, he remained behind. Lucia is a beautiful woman who dedicates herself to the farm. Despite the hardships of their labor-intensive life, they lead a peaceful and happy existence. However, one day they notice some strange, colorful flashes underwater in the well before they quickly disappear. From this moment onward, inexplicable events begin to occur around the farm, filling the lives of its inhabitants with terror and suffering.