Outcast werewolf Alun Blayney is jaded, fearful of what could happen if even one human were to discover monsters are real. Police Constable James Heron is an idealistic young man convinced that love can overcome any differences. When they meet over the body of a woman murdered in the streets of 19th century London, they form an uneasy friendship.

As the murder investigation progresses, the attraction between them grows, but before they can see the case or their relationship through, there are obstacles to overcome. A sadistic pack leader is out to get Alun, a daemon has fallen in love with James, and James’s immediate supervisor is determined to pin the recent murders—and last year’s rash of Whitechapel homicides—on Alun.