When Agent Charlotte Boyer gets her first chance at a field investigation, she is called upon to examine what is being called an animal attack, but although she is in complete agreement that the perp is an animal, she's convinced it's of the two legged variety.

The main question in her mind is regarding the shaman--is he actually interested in her as a woman? Or is his interest much darker? 
 
From her first encounter with John Greywolf, Charlotte Boyer finds herself so enthralled by the passion he ignites in her that it unnerves her almost as much as his ability to pass unnoticed by security cameras and undeterred by locked doors—his shadow walk. Is it at all possible that two men with supernatural powers walk the reservation? Or has she been seduced by a serial killer, the ‘skin walker’—part human, part puma, who rapes and savagely kills?