When John and James Blackthorn are invited to a family reunion at the Sweet 18 hotel, they arrive expecting a relaxing weekend catching up with relatives, but aside from the desk clerk, the hotel is empty. It soon becomes clear that they're not alone; a dark mist haunts the halls of the creepy hotel and it seems to know something the brothers don't. What secrets does it know and more importantly, what does it want? Can you discover what stalks the corridors of the Sweet 18 and learn its secrets?