When High Emperor Lunaris Draco crosses the Prism Grid portal to Earth, he finds the planet conquered by a Solari overlord: Thalor Naja, his mother’s ex-husband and the biological father of his brother, Smoke Viperine. Stranded, Lunaris allies with Marie Collins, the human leader of the Blue Vanguard rebellion. As they wage war against Thalor's regime, Lunaris and Marie forge a deep bond and have a daughter, Clara, setting the stage for a tragic, brutal showdown with his own dark family.