Six years ago, on the night of the Blood Moon, Ella, a low-ranking Omega healer, sacrificed herself to save the gravely wounded Wolf King Cedric. While she was unconscious after a difficult labor, her biological sister Vera—who was born infertile—stole her newborn son Noah. Vera lied that the baby had died, then used Noah as leverage to sustain her own contract marriage. Six years later, Cedric tracks down the leads and finds Vera, who had long been abandoned by her ex-husband. She shows him a wolf-fang pendant and falsely claims to be his "fated mate." Out of gratitude and duty to the royal bloodline, Cedric brings Vera and Noah back to the royal court. Though he feels no love for Vera, Cedric indulges her out of obligation, while harboring prejudice and mistreatment toward Ella, who has been struggling to raise her daughter Lily and practice medicine alone. To conceal the truth that Noah shares no blood resonance with her, Vera not only abuses him but also secretly poisons the pack's pups and repeatedly frames Ella for treason and poisoning. Facing these accusations and the Wolf King's coercion, Ella stands her ground with dignity and uses her unparalleled medical skills to prove her innocence in court. During a medical emergency, Ella and a dying Noah unexpectedly trigger a "maternal blood pact," tearing open the six-year-old secret of the stolen child. As a pair of pure-blood twins awaken under the full moon, Vera's crimes are fully exposed. Driven to desperation, she kidnaps the twins and launches a bloody sacrifice at the Moon God altar. Cedric and Ella fight side by side into the forbidden ground, and the Wolf King finally recognizes who his true fated mate is. With the truth revealed, the once-arrogant Wolf King sheds his royal robes and begins a humble yet sincere journey to win Ella back. In the end, the family of four finds their true happiness under the Blood Moon.
