A devastating KrynX virus pandemic, decimating a third of the human population. Big Pharma's inability to produce a vaccine forces the United Nations to reveal a centuries-long secret: the existence of vampires and the curative properties of their blood. This revelation stems from a deal made with vampires centuries ago.The current crisis necessitates a new agreement: vampires will provide their blood for a vaccine in exchange for full human rights and societal integration. This deal, however, is met with widespread resistance and prejudice from both humans and vampires. Terrorist groups emerge on both sides, fueling violence and mistrust. Adriana, a young woman, is rescued by Ezra, a vampire, and their relationship forms the core of the story. Their romance unfolds against a backdrop of societal upheaval, prejudice, and violence as they fight for acceptance and understanding in a world grappling with the shocking truth and its consequences. Ariana and Ezra navigate the complex relationship between humans and vampires, fighting against both human and vampire prejudice. Adriana must uncover a conspiracy that ties her past to the future of both species-before the darkness claims them all. A pulse-pounding blend of science fiction, gothic romance, and political thriller-Dark Serum is a haunting vision of love, power, and survival in a world where humanity's salvation may come from the shadows.