Like a shadow

It's in there somewhere. He's hiding. And he's always watching. Edinburgh CID has its hands full with the case of a kidnapper who witnesses describe as a shadow rather than a real person. The investigation team is therefore expanded to include the unconventional American forensic psychologist Connie Woolwine and London-based Inspector Brodie Baard. Together they are on the trail of a disturbed perpetrator. Will they be able to prevent the strange man from plunging more innocent victims into a nightmare?