Heaven has fallen, Hell has ascended, and archangels rule the world with iron fists. The only place left with any freedom is Sin City. The devil's playground. Grace Morningstar, the secret granddaughter of Lucifer, is living in Sin City, a dangerous metropolis once known as Las Vegas now ruled by the devil and the seven Princes of Hell. Here, everyone has a sin that calls to them, even Grace. Despite the danger, Grace is determined to uncover the truth behind the sex trafficking ring that has preyed upon the human women in Sin City. With the help of her fallen angel partner, Jax, and her long-time crush, Finn, a demon bar owner, Grace goes undercover as a barmaid in hopes of discovering the source of the criminal enterprise. When Grace is kidnapped by one of the leaders of the sex trafficking ring, she is forced to fight for her freedom… Only, she fears she will be its next victim instead. The fight against good and evil has begun. Welcome to Sin City…