Nothing held, Nothing kept. Operative Liza Vantic has given everything to the order that guards the stacked cities: her name, her childhood and her right to love. Then the visions begin. Premonitions are heresy, punishable by death, but they show her the destruction and death that will happen if she ignores them. She has to hunt a threat no one else can see as she falls in love with a fellow operative that has sworn the same oath she is breaking. The secrets, like the cities, can only be stacked so high.