The night Cassia has fought for is here. At last, she’ll drink Lio’s blood and join him as an immortal Hesperine, fulfilling their Grace bond. But then an unexpected guest returns to Orthros with a revelation about the past she never imagined. Secrets lay hidden in the illustrious Empire, where she must travel with Lio to find the truth.

Lio has risked everything for his Grace before, and he’ll do it again. He’ll stand between Cassia and the politics pulling her back toward the human world. He’ll push his magic to new limits to keep her safe. Even if it destroys his life’s work as a diplomat – or Cassia’s trust in him.