Love. Betrayal. Revenge. Lucifer has escaped from purgatory. Darkness descends on both Horizon and the mortal world. The Order of the First is the on move, systematically turning angels against angels. Their numbers continue to grow as chaos and destruction overwhelm the Legion.Meanwhile, Alexa is trapped in Tartarus, the impenetrable and inescapable angel prison, knowing all too well that she's responsible for Lucifer's breakout. But can she find...