Selene now knows that Satan is walking the earth and her new mission is to stop him. Her problem? How can you stop someone if you have no idea where they are hiding? Selene's coven cracks down to help her as they attempt to bring the world back to order. Raguel teams up with Selene as she does everything she can to rid the world of Satan, even if that means going to Tartarus. This is the exciting conclusion to The Moonstone Trilogy.