The only thing more annoying than a ghost flash mob is a rogue vampire attack... Supernatural investigator Mina Summers is only one undercover mission away from the promotion she's worked for her entire career. Her assignment is simple: figure out why several unregistered vampires are going rogue-including one that ruined her best suit-and attacking humans. Her investigation leads her to Thinner, a new celebrity-endorsed weight loss company that's shrouded in mystery and promises seemingly impossible results. Mina's convinced she'll finish her mission in time for dinner, but when she face-plants into Carma Nicks, Thinner's smart and sexy vice president, Mina's suddenly out of her depth. Surely her heart is only racing due to adrenaline, right? Falling for-and sleeping with-a mark goes 100% against protocol, but Mina's plans to keep her distance are as flimsy as the agency-issued ghost that resides in her apartment. When Thinner's secrets disrupt the peace between supernaturals and humans-and threaten Carma's life-Mina's forced to choose between protecting her dream career or saving the woman she loves.