Lily Yu is a San Diego police detective investigating a series of grisly murders that appear to be the work of a werewolf. To hunt down the killer, she must infiltrate the clans. Only one man can help her--a were named Rule Turner, a prince of the lupi, whose charismatic presence disturbs Lily. Rule has his own reasons for helping the investigation--reasons he doesn't want to share with Lily. Logic and honor demand she keep her distance, but the attraction between them is immediate and devastating-and beyond human reason. Now, in a race to fend off evil, Lily finds herself in uncharted territory, tested as never before, and at her back a man who she's not sure she can trust . . .