A teacher is accused of statutory rape when he helps a student cross state lines to get an abortion.
During a murder investigation, Corcoran finds new clues about his daughter's death and the disappearance of his wife, as well as a tragic personal link to one of Five Points' most infamous women.
Corcoran and O'Brien are assigned to solving a peculiar double murder. As they weigh the evidence, it becomes apparent that the facts come together in a surprising case of revenge gone wrong.
When a gang scheme to rob the wealthy is uncovered, Corcoran must ensure security at an upscale fundraiser. As the police must prepare for the gala, tensions mount between the detectives and their superiors.
Corcoran once again finds himself reevaluating his decisions about Annie. Meanwhile, the arrival of a group of high society out-of-towners offers Robert Morehouse a unique business opportunity.