Among them is Luna Wilder, a tough-as-nails police officer whose job is to keep the peace. As an Insoli werewolf, Luna travels without a pack and must rely on instinct alone. And she's just been assigned to find the ruthless killer behind a string of ritualistic murders—a killer with ties to an escaped demon found only in legend…until now.

But when she investigates prime suspect Dmitri Sandovsky, she can't resist his wolfish charms. Pack leader of a dangerous clan of Redbacks, Dimitri sends her animal instincts into overdrive and threatens her fiercely-guarded independence. But Luna and Dimiri will need to rely on each other as they're plunged into an ancient demon underworld and pitted against an expert black magician with the power to enslave them for eternity…