Susy, gains her confidence and charms her. Susy admits that Sam did bring home a doll, but she doesn't know where it is now. Gloria, who had taken the doll, without Susy's knowing, sneaks back into the apartment after Mike has left and leaves it under the sofa.

Susy discovers the doll and, still thinking Mike is a friend, telephones him with the good news. Cautious because of the unusual interest in this doll, and unsettled because of the discovery of a dead woman's body (Lisa's) in the neighborhood, she arranges a set of signals with Gloria, who is watching upstairs.

Through the signal system with Gloria, Susy suddenly realizes that she is being victimized by the three strangers. She sends Gloria to get Sam. When she goes to call the police, she learns that the line has been cut and that she is at the mercy of the thugs until help can come.

Realizing her disadvantage of sightlessness, Susy smashes all the lights, except one. Meanwhile, Carlino has been killed by Roat in an attempt on Roat s life. Mike tries to help Susy and is knifed by Root.

Roat then proceeds to terrorize Susy with the threat of setting the place afire. Susy manages to douse the last light and Roat finds himself at war with a blind girl in a darkness she knows better than he.