As the city receives a typhoon alert, the girls recall an incident when they explored a supposedly haunted hotel. With no one quite sure of what actually happened, they try using the wishing rock to remember, although it doesn't appear to work at first. However, when they get home, they find that their younger selves from four years ago are walking about. The girls follow their younger selves as they prepare to explore the haunted hotel, oblivious to the time period they are in or the approaching typhoon...