In the Ash Crown Empire, Ethan Cross is the youngest Chief Commander alive — and he has only one rival: to Lucien Draven, the Dragon King.Sent to kill him, Ethan holds a poisoned blade to Lucien's heart and trembles all night. When a regicide plot threatens both their worlds, a sacred bond seals their fates. The whole world wants them to kill each other. They keep getting closer instead.The best enemies make the longest lovers.