When a compassionate devil comes to earth to stop his brother from spreading an evil virus, he is willing to do anything to make sure mankind is safe. But he's resolve grows stronger when he encounters a woman who reminds him a lot of his past and they kick it off hot and steamy. Seen as a disgrace to his family, he fuels his campaign with this and continues fighting. Soon, he finds out his brother's plans were worse than he expected. Will he be able to defeat the darkness when he's already a part of it? But most of all, will the Undivulged son be able to save mankind?