When a former child star turned party girl Mac wakes up on Halloween after a wild night on the town with no recollection of her whereabouts and afraid she may have committed murder, Elsbeth and the team retrace her steps to find the truth. Meanwhile, Captain Wagner must address low morale at the precinct.

When Elsbeth takes a tour of famous New York crime scenes she is left with nagging questions about a legendary Mafia slaying in Little Italy, and about the owner of the family restaurant where it happened, Pupetta Del Ponte. Also, Judge Crawford's grudge against Elsbeth causes a roadblock in the investigation