Barri and Noah, a newly engaged Brooklyn couple, are disheartened by the death of their elderly downstairs neighbor, Sylvia. Though Noah sees nothing unusual about the old womans death, Barri suspects foul play and sets out to investigate, enlisting her roommate Jean to join her on a reconnaissance mission to trail a possible suspect. Tensions mount, however, when the investigation uncovers unsettling secrets throughout the building-including in their own apartment-and suddenly everyone seems like a reasonable suspect.