Allison Reeves, a forensic veterinarian, is an avenger of the abused. A New York City transplant, she moved to Maryland's rural Eastern Shore to live with her boyfriend, K-9 Senior Trooper John Thibert. Today she is the director of the mid-Atlantic Region of the Humane Society for the Prevention of Animal Cruelty (HSPAC), and is searching for the killer of a large, black pit bull bearing fighting scars. She and best friend and partner Jackie Vincente, a lead investigator for HSPAC, and John are dragged the underbelly of the pit bull fighting world where both dogs and their owners turn up dead. Equally disturbing, Allison discovers previously confiscated dogs are mysteriously returning to the big-ticket Friday night fights. The trio methodically uncovers the major players in this Mecca of dog fighting, but the murderer of the black pit bull still eludes them - until Allison risks her life facing down the killer who no longer has anything to lose.