After four Arc Angels fall from heaven during a war, they wake up on a planet known as Kali, the world between heaven and Earth. Now, they must find their way back to heaven if they want to survive. Meanwhile, Lucifer plans to destroy Kali for his own mysterious purposes. The fallen Arc Angels must stop Lucifer before he can carry out his plan. Will Lucifer destroy Kali? Will the angels return to heaven? The story begins in ANGELS-Genesis.