Trooper Jim Duncan's first day with the Criminal Investigation Division starts off with a bang when he is called to a murder scene with a badly decomposed body. After he finds an abused greyhound in the victim's garage, the simple homicide becomes more complicated. Why would anyone want an unreliable racetrack employee dead, especially when greyhound racing is illegal in Pennsylvania?

Assistant public defender Sally Castle is facing her own career change. When she accepts a position with an old law school friend, her first case seems to be one that is exactly what she wants to do. Then she learns the greyhound adoption group her client may have embezzled from has ties to the shooting victim. What else is her client hiding?

Jim and Sally work their respective investigations, which may or may not be related. Along the way, they learn important lessons about themselves, those they work with, and the people they protect. But can they complete their tasks without falling prey to a killer?