Varden (2006)

A priest is certain that the child his wife has had with another man is possessed by the devil. He kidnaps the child, carries it far up into the mountains to a cairn, and stones it to death, praying that the devilish soul will never leave the stone, which he then places on top of the cairn. Many years later, a young man named Tore discovers the cairn and the stone, lifts it up and removes it from the cairn. He should never have done that.