Lacy is a nearly 40-year-old investigator for the BJC who feels stuck in a personal and professional rut. She is resourceful and conscientious but lacks the motivation to change her stagnant circumstances. When a civilian presents her with evidence of a serial killer operating within the judiciary, her dormant craving for excitement is awakened.

Jeri is a determined woman who has spent two decades obsessively tracking the man she believes murdered her father. Operating alone, she uses charm and aliases to extract information from law enforcement without leaving a trail. Her thirst for justice occasionally pushes her to take dangerous risks.

Bannick is a sitting judge in Pensacola, Florida, who maintains a respectable public facade. Behind his professional exterior, he harbors intense arrogance and nurses lifelong grudges over minor slights. He uses his sharp intellect and customized computer spyware to monitor threats and execute vengeance against those who have crossed him.

Lacy's brother is a successful real estate mogul operating out of Atlanta. Energetic, ambitious, and constantly seeking novelty, he serves as a sharp contrast to his sister's more cautious nature. He frequently criticizes Lacy's life choices but remains fiercely loyal and protective.

Allie is an FBI agent who has been dating Lacy for two years. Worn down by 70-hour work weeks, he feels increasingly frustrated with his demanding career. He cares deeply for Lacy but struggles with the uncertainty of where their relationship is headed as they both face midlife crises.

Nicknamed "Cleo," Charlotte is Lacy's supervisor at the BJC. She is an ambitious career climber who focuses heavily on networking with male superiors. She views competent, hard-working women like Lacy as threats to her own advancement and prefers passing difficult cases to other agencies.

The only member of the BJC who has been around longer than Lacy. Sadelle possesses an encyclopedic memory of the department's cases over the last half-century, providing vital historical context for unusual investigations.

A junior investigator at the BJC who assists Lacy. He accompanies her on field visits to local law enforcement offices to verify the details of decades-old murders, bringing fresh energy to the depleted department.

A private investigator based in Mobile, Alabama. Jeri employs him to handle on-the-ground inquiries that she cannot safely conduct herself. His digging at a police evidence warehouse inadvertently leaves a digital trail.

A former arresting officer who handled a minor dispute thirteen years earlier. He provides a crucial link in the investigation when a private detective jogs his memory about an old case involving a house painter and a local lawyer.

The sheriff of Harrison County. He processes a complicated crime scene and later receives a bizarrely misdirected envelope from the killer, drawing his local department into a much larger federal investigation.

A house painter whose past dispute over an unfinished job and alleged threats left him unknowingly marked for death. His murder thirteen years after the initial incident provides a crucial missing link for investigators.

Lanny Verno's supervisor who suffers the tragic misfortune of arriving at a job site exactly as a murder is taking place, becoming an unplanned casualty of a highly organized killer.

A retired FBI Behavioral Analyst. He reviews the timeline and methodology of the various murders, confirming for Lacy that they are dealing with a highly organized serial killer whose behavior is actively escalating.

Judge Bannick's receptionist. She manages his professional schedule but is kept completely in the dark regarding his actual whereabouts and hidden activities outside the courthouse.

An FBI agent assigned to the joint task force investigating the judge. He coordinates the federal response and works to secure vital physical evidence.

Jeri's daughter, who deeply worries about the toll her mother's twenty-year quest for justice has taken. She serves as a grounding force, hoping her mother can eventually abandon her obsession and build a normal life.

Jeri's brother, who chose a very different path to cope with their father's murder. Believing the crime would never be solved, he estranged himself from his sister to avoid her relentless obsession with the case.