The Demon Hunters are about to face their biggest test, and they'll need a lady to make the grade...

Lady Serena Thurston had big plans—attend the best balls, meet a fine gentleman, get married, have a child or two and live happily ever after. But plans change. Serena knows firsthand what demons can do, and nothing will stand in the way of her goal to become a Demon Hunter—not even her absentee fiancé.

Tad Douglass is furious his fiancée has enrolled in the Demon Hunters' school. Admittedly, he should have been more attentive after her capture by demons, but important Hunter business demanded his presence. Now, he's forced to watch her transformation from an innocent young woman to a formidable Hunter. He'll use every resource at his disposal to change her mind and return her to the simple life of a debutante.

When people go missing in London, Serena and Tad must investigate—together. The mistrust and love simmering between them during their perilous mission is brought to a boil at the gateway to Hell. With the lines between good and evil blurred, and death lurking at every turn, it will take a leap of faith to embrace this new partnership—as heroes and as lovers.