You go to take your sister to her friend's birthday party at the hotel that has been prepared, you can't wait long, you tell your sister to wait to be picked up when the party is over. The elevator doors open, you enter and go to the 1st floor, when on the 15th floor the elevator suddenly stops and the lights turn on and then off. 1 minute later the elevator door opened and revealed a dark room and hallway.

"Hm~, hm~" male humming sound in the dark.