Susy Hendrix, a blind woman, lives in a basement apartment in Greenwich Village with her husband, Sam. After Sam returns from a trip with a doll entrusted to him by a stranger, the couple remains unaware that the doll is filled with heroin. Three criminals named Roat, Mike, and Carlino conspire to retrieve the doll. When they discover Susy's blindness, they see an opportunity to manipulate her into revealing its location. Posing as various people, they weave a series of lies to gain Susy's trust and access to her home.

As the deception unfolds, Susy slowly begins to sense that something is off. She grows suspicious of the strange visitors and their inconsistent stories. With the help of her young neighbor Gloria, Susy attempts to piece together the truth. Utilizing her acute sense of hearing and spatial awareness, she starts to fight back against her tormentors. As danger escalates, so does Susy's determination to outwit her adversaries, leading to a suspense-laden showdown in the dark confines of her apartment.