Top PR specialist Sienna transmigrates into the life of high-society heiress Sienna Sterling. Hoping to finalize a lucrative divorce and enjoy a life of leisure, she stumbles into the underworld temple of Dominic Thorne—the cold, ruthless mob godfather of New York. A freak accident merges their blood, turning her into his sole living antidote against a rare, deadly neurotoxin. Bound by blood and entangled in deadly mafia conspiracies and her ex-husband's relentless obsessions, Sienna and Dominic navigate lethal deceptions. From cautious allies to passionate soulmates, they conquer the night empire together, finding ultimate redemption and romantic reign.