Screenplay

It just occurred to me that I've been writing a screenplay for a few months, and like four people know of it's existence. So I guess I'll post the plot line and you guys can tell me what you think.
It's a physiological Thriller called The Tale of Harlequin and The Nightbird, and it's about a man named Laurent. He lives in Paris with his daughter Madeline. his wife had died giving birth to Madeline, and when that happened he became very reclusive and secretive, and began writing horror novels. When Madeline was ten, he started writing a book called "Harlequin and The Nightbird," about a man who dresses in a clown costume and kills people, and his sidekick, a man who dresses in black and helps him. Laurent studies all sorts of famous murder cases, and he spends so much time locked away in his dark room reading about horrible things that he starts to go crazy. An imaginary raven that calls it's self the nightbird begins to come and watch him work, and sometimes talks to him.
Meanwhile, Madeline has begun to spend a lot of time with Jon, an old man who owns a nearby cafe. One day, Laurent decides that he needs to meet the man Madeline is always talking about. He goes to meet him, and the nightbird comes too. Jon is almost deaf, and having to talk so loudly irritates Laurent. He hits Jon really hard, and the old man falls down and hits his head. He dies. Laurent feels horrible about it, but he also feels slightly satisfied. He goes home.
A while later, he asks Isabel, his neighbor, on a date, and she agrees. After he walks her home, his memory blanks out, but the next morning she is laying next to him, dead, having been stabbed several times. He is terrified and wonders who did it, but then he finds his fingerprints on the knife and realizes it must have been him. He hides her body.
I'm not going to list all of his many murders, but they include an autistic boy and several young girls at a sleepover. Every time he kills someone, the Nightbird gets bigger and more controlling of him. Eventually, he is trying to kill Madeline because she discovers a body in the attic, but she convinces him to put down the gun. As soon as he turns his back, she shoots him and calls the police to turn him in. As Laurent/The Harlequin lays there dying, the Nightbird leaves him and sits on the shoulder of a female police officer who was taking the (unfinished) novel with her.

So, yeah. It's not amazing, but I think it would be a cool movie.