Ghost lullaby

In the empty room on the end of the hallway this time, in another room the next or in the hallway itself the time after that. People have come to the place before and all have claimed to have heard it. A strange sound on moonless nights like a soft breeze of the wind. Others claim it's like a musicbox that makes soft plinking sounds but it's always a strange tune. When you try to look for it the sound moves or disappears only to reappear somewhere else. The sound both follows and is followed by you as you walk through the place. The longer you stay in the place you get the feeling the sound gains volume as though amplified by the walls around you. It gives you the feeling that you are getting closer to the source. The sound now fills the room you entered but still is it impossible to tell what it is, although you get the feeling that you know it. It keeps luring you to the center of the room, where the feeling of familiarity is coming from. As you try to figure out where you heard the sound before you come in the center of the room and you close your eyes to focus on the sound. Slowly your mind fills with flashes of memories of the past, except it's not your past. Although the memories have a calming effect they are laced with an eery edge as if something bad is going to happen. You open your eyes again and look around the room to find the source of the sound but you can't find anything. Although the room has been empty for a long time you can still see what used to be in the room, as if the images are carried by the sound. Then the sound grows more familiar and your feeling of unease grows as you still can't find the source. The sound changes into a lullaby as it keeps awakening the memories that are not yours. You start humming along with the lullaby and as soon as you hear a voice you realise that it is your own that is singing along at first unclear but slowly gaining power. You notice that its an lullaby that you should not know. While this is happening the flashes of memories increase and your sences are on overdrive. Someone is coming up from behind you, or is it an memory? The line between present and past blurrs as the lullaby reaches its peak and you turn around. The air in the room grows cold the sound stops and everything turns black.