There's a lethal new recreational drug out on the party circuit. To stop its spread, Team Darkwing must immerse themselves in New York City's nightlife, where they discover ties between the drug's revenue and the country's most powerful dynasty. To infiltrate the family, Daphne flirts with its weakest link, a party boy whom she'd love to sink her teeth into. But even as their dalliance leads her deeper into the case, Daphne can't stop thinking about Darius, the darkly sexy human she claimed with a passionate bite. He's the bad boy she knows she must forget-if she doesn't, she'll be risking not only the mission but her own heart.