Amy was once a party girl, but she now lives a lonely life, helping the house-bound to receive communion in the Gravesend neighborhood of Brooklyn. She stops in at one of the apartments on her route and Mrs. Epifanio says her usual caretaker, Diane, has the flu—or so Diane's son Vincent says.Amy's brief interaction with Vincent in the apartment that day sets off warning bells, so she assures Mrs. E that she'll find out what's going on. She tails Vincent and a mysterious man through Brooklyn, but then, almost before Amy can register what has happened, Vincent is dead. And for reasons she can't quite understand, Amy collects the murder weapon from the sidewalk and soon finds herself on the trail of a killer.