September 17, 1864. New York City is still recovering from the Draft Riots of 1863. In Five Points, the worst slum in the country, Detective Kevin Corcoran of the New York City Metropolitan Police Department's Sixth Precinct finds himself investigating the murder of a young girl that hits uncomfortably close to home. As the investigation heats up, detectives Corcoran, Francis Maguire, Andrew O'Brien, and old comrade, Doctor Matthew Freeman, must navigate the slums of Five Points and the mansions of Uptown to search for the child's killer.