Seven archangels guide the fate of humanity: the angels of life, death, miracles, nature, progress, free will, and emotions. When Violet, the angel of emotions, renounces her ministry, her actions prompt a series of events that will bring the end of the world as we know it. As Violet is punished and condemned to be bonded to a human named Ruth, a reluctant prophet, they uncover a demonic plot to bring upon the end of the world. One by one, the seven archangels fall prey to attacks from the Deadly Seven, a group of powerful arch-demons that personify each of the seven deadly sins. With the...