In a dark realm shrouded by a blood-red moon, the vampire race holds humanity under its oppressive yoke. When the human soldier Kalian rescues the gravely wounded vampire queen, Eleanor, his unique blood sets a turbulent chain of events into motion. After surviving the brutal Blood Arena and awakening an ancient lineage, Kalian discovers a devastating truth: his mother was killed by Eleanor’s own father. When the Grand Duke Augustus launches a rebellion and seizes the vampire capital, Kalian rescues the captured Eleanor. Together, they join forces with the wolf clan to quell the uprising, ultimately forging a blood-sworn pact of coexistence among the three factions—bringing an end to a century of enslavement.