Mary Pat is a 42-year-old single mother who works as a caretaker at a Catholic nursing home in South Boston. She carries immense grief from losing her first husband to a disappearance and her son to a heroin overdose. When her teenage daughter fails to return home, she refuses to accept the community's passive excuses and physically confronts local criminals to demand answers.

Bobby is a homicide detective investigating a suspicious death at the Columbia subway station. He lives in nearby Dorchester and understands the closed-off culture of South Boston better than his fellow officers. He is a military veteran who actively manages his recovery from addiction by attending Narcotics Anonymous meetings.

Marty is a notorious crime boss who completely controls the South Boston underworld. He prioritizes silence and stability in his territory, ensuring that residents do not draw police attention. He capitalizes on local fears regarding school desegregation to strengthen his grip on the community.

George is a drug dealer operating in South Boston. He enjoys absolute protection in the neighborhood because his mother dates Marty Butler. He exploits his untouchable status to act with total impunity and takes pleasure in asserting dominance over the local teenagers.

Jules is Mary Pat's 17-year-old daughter who vanishes after a night out with friends. She is a high school senior struggling to find direction and purpose. She possesses a gentler nature than her mother, appearing fragile against the harsh environment of South Boston.

Calliope is a health aide working alongside Mary Pat. She is the only Black person on staff and goes by a childhood nickname at work. She experiences a devastating tragedy when her son dies in a subway station incident.

Augustus is a 20-year-old Black man who recently graduated from high school and entered a management training program. He dies under suspicious circumstances at the Columbia subway station in a majority-white area. His death sparks immediate tension in the politically charged city.

Brian is a lieutenant in the local criminal organization. He enforces the rules of the neighborhood and ensures residents participate in community actions. He uses his authority to quickly silence anyone who might attract police attention to the area.

Frank is a married father and an enforcer for local criminal enterprises. He operates with absolute impunity in South Boston and follows the neighborhood's brutal rules without hesitation.

Ronald is a teenager who works at a supermarket loading dock. He spends his free time drinking and smoking marijuana with his friends. He provides evasive answers when questioned about the night Jules vanished.

Brenda is a teenager living in South Boston. She frequently hangs out with a specific group of friends and provides contradictory accounts of the night her best friend disappeared.

Kenny is a gentle man who works in the Harvard mail room. He chose to leave his marriage and the aggressive culture of South Boston to pursue a quieter life. He provides a listening ear to his ex-wife despite their separation.

Pritchard is a police detective working homicides in Boston. He approaches his investigations with blunt force and prefers aggressive policing tactics. He relies on his partner's local knowledge to handle neighborhood residents.

Donna is a South Boston resident who enjoys the material comforts provided by her husband's rising criminal status. Despite her comfortable lifestyle, she feels an underlying dissatisfaction with her circumstances.

Carmen is a woman who works at a shelter for abused women. She maintains a strong sense of faith in humanity despite witnessing extensive suffering. She enters a cautious courtship with a local detective.

Bess is a battered 1959 Ford Country Sedan. Despite her faded appearance, she possesses a powerful engine and serves as an indispensable tool for her owner. She blends into the background of the neighborhood easily.

Peg is a South Boston local who rigidly adheres to the neighborhood's insular code. She is deeply bound to the community's expectations and readily dispenses critical advice to her family members.

Noel is a deceased military veteran who survived combat overseas only to succumb to addiction upon returning to South Boston. His death casts a long shadow over his mother's life.

Dukie is a man who disappeared years ago due to his involvement in organized crime. He leaves behind tools that eventually prove useful.

Reginald is a grieving father who lives in Mattapan. He harbors immense anger toward the community responsible for his recent tragedy and refuses to accept shallow condolences.