In dark modern Europe ruled by the vampire council, Leo is a lowly blood slave auctioned in the underground market. Humiliated and tormented by arrogant noble Cedric, he is saved suddenly by vampire crown prince Lucien. The prince claims Leo openly, raising him above all nobles and dragging him into vampire power struggles. Lucien protects Leo relentlessly against noble insults and conspiracy. Leo awakens a rare power that can suppress pure-blood vampires, making him coveted by the council. It is revealed he is not a humble half-breed, but a lost ancient royal heir with powerful ancestral blood marks. On the blood moon coronation night, the council frames Leo for execution. At the altar, Leo awakens his ancient bloodline and subdues sacred relics. Lucien kneels before all nobles, binding a life-and-death blood marriage with him. Together they expose royal conspiracies and underground slave trades. Leo breaks free from being a blood slave and becomes the one who rewrites the entire vampire order.
