A little girl named Blanche has nothing to do except stare at her music box. She decides to explore the basement of her grand mother's house. Through the darkness, she will meet a little girl from her imagination: Noemie. The two girls look exactly the same, just like a mirror reflection. With that in mind, Noemie tries to lure Blanche into loosing herself in her own imagination to finally take her place in the real world.