Teen girl has a secret empty house/apartment/room she goes to adjacent? to where she is living to hang out. She has hung white fairy lights around the room. One time when she sneeks into the room, she finds an injured man who has snuck in a window. I don’t know whether he is a bad guy or a good guy but he has been shot. She helps him recover. I want to think Pierce Brosnan is the injured man? I believe I saw the movie in the 90s.