I almost did not watch this movie based on negative reviews, though I like Naomi Watts. I find it hard to believe that anyone entered into this film thinking it would be a thriller about someone terrorizing Naomi's character with a door buzzer, and hoping for that. This film is about a woman who is in the depths of grief and guilt, and it's the Summer of Sam (this is not a "Summer of Sam" film -- simply setting the stage for that blistering hot, gritty, and fearsome period - a perfect backdrop for this character's state of mind). She is hiding out in a dangerous part of NYC (her grandmother's old apartment, like a hot womb), unable to leave, filled with pain. She has hit bottom, and then there is this buzzer that grates on her raw, damaged nerves, the sound frightens her, and it abruptly buzzes like a saw every night, 3-4 times. No one is there. No one responds to her cry for identification. Just the noise of the riotous street below. The film is about a tormented woman who had bravely opened her heart to the world through writing a brilliant novel about her wealthy father and wound up learning, during a TV interview, about his sudden, fatal heart attack. Soon after, her family disowned her. In her grief, she has come to believe she might be a danger to the world, and she sees the world as a danger to her. The buzzer is a mystery. A man she allows into her home suggests it might be a calling...the world and life calling to her to return. This film does fit the Hitchcock model. Hitchcock's films are sometimes about the fragility of the human spirit. I'm glad I finally gave this film a chance, and I believe it is a successful venture.