Joe Gunther gets the call that every law enforcement person hates and every friend and family member of a policeman fears–a cop has been murdered in the line of duty. Deputy Sheriff Brian Sleuter has been shot to death during a routine traffic stop on a dark country road. From what can been seen on the cruiser’s tape recorder of the killers, it is believed that they are a couple of Boston-based drug runners who were stopped by the deputy on their way from Canada down to Boston. That brings Gunther and his major crimes team into the investigation–and eventually to Alan Budney, the disaffected son of a Maine lobsterman, now a drug kingpin, who uses the closed, clannish lobster fishing community, and his extended family in particular, to move drugs along the New England coast.