When a Haven police officer dies from a terrifying infection inside the police station, the new Chief seals the building to contain the outbreak – with Audrey, Nathan, Duke and Evi trapped inside.
As New York City is still recovering from the Draft Riots of 1863, Detective Kevin Corcoran finds himself investigating the murder of a young Five Points girl that hits uncomfortably close to home.
Racial tensions in Five Points come to a head as the body of an Irishman is discovered lynched and hanged.
During a murder investigation Corcoran uncovers a new piece of evidence that provide clues about his daughter's mysterious death and the disappearance of his wife.
Jake tries to find a missing driver; Leslie offers to help Jake and the Doyles; Mal and Des reach rock bottom.