A young New York couple (Mia Farrow and John Cassavetes) moves into a new apartment building, where they’re quickly befriended by lovable Ruth Gordon and husband Sidney Blackmer. All is not as it seems, though, and Farrow soon comes to suspect that her neighbors have truly sinister plans in store for her and her unborn baby. This eerie supernatural thriller builds shivery atmosphere through each successive scene, right up until the shattering climax.