Third-year law student Kayla Beck receives a chilling telephone call. A stranger has chosen her to be the rescuer of a woman he has abducted. Kayla can either attempt to rescue the woman and possibly save her life or she can ignore the call and never be bothered again. If she disregards the call, however, no one else will get a similar opportunity. The woman will die. What happens next catapults both Kayla and Denver homicide detective Bryson Coventry into a deadly world where the FBI has been hunting unsuccessfully for years; a world of unknown boundaries and dangers; a world where, in the end, the only hope of getting out is to go all the way in.