This is a weird French movie. It's original but rather boring.
A woman is out shopping for shoes, and her purse is stolen. Later, an older man finds her wallet abandoned in a parking lot. He thinks about returning it to her, and we hear his entire inner monologue. He keeps playing out these different scenarios in his mind of what it would be like if he called her up. He goes through her wallet, discovers things about her, and starts getting very interested.
He finally turns the wallet in at the police station. They call the lady and when she picks it up, she asks who returns it. She would like his name and number, so she can thank him. When she calls him and says thanks, he asks if that's it, doesn't she want to meet? She says no, and he gets pissed. Then he starts stalking her. He leaves messages on her answering machine every night, he leaves notes for her in her mailbox, and he even slashes her tires at one point.
She tells the cops, they ask him to leave her alone, and he does. But then something funny happens. She starts to get interested in him, and she starts calling him.
From there some unexpected things happen. I really liked the performance by Andre Dussollier as Georges Pallet. He has a great voice and a great way of delivering his lines. The story kept me interested because I was curious to see what happened next, but at the same time it bored me too. Interesting stuff happened, but the characters did not react the way normal people did. It somehow took the impact out of everything.
And what the hell is up with the ending? Strangest, most random last line I've ever heard in a movie.