Mrs. Hilyard (de Havilland), a wealthy semi-invalid who lives in a three-story New York townhouse, finds herself stranded in her cagelike elevator as a result of an electrical failure. Malcolm (Swan), her rebellious 29-year-old son, is not around, but the alarm she rings catches the
attention of a wino (Corey) who breaks into the house. Instead of helping, he makes himself at home, later bringing in Sade (Sothern), a prostitute friend. Three teenage punks led by psychotic Randall (Caan) arrive to terrorize Mrs. Hilyard, rape Sade, and kill the wino. The tension continues to
mount, and the violence escalates on the way to the shocking finale. It came as a surprise t...