Stay for today. Stay Forever. Audrey Casella is staying at the swanky Ruby Hotel, which was completely unplanned, but she's glad for the unexpected stop nonetheless. A few months after their mother's death, Audrey and her brother Daniel go to stay with their grandmother—although a relative, but almost a stranger—because their father has given himself over to grief. Audrey and her family plan to spend only one night at the hotel, but life at Ruby's " is like a fairy tale, and they extend their stay because there are plenty of distractions - including a handsome guest, Elias Lange, who makes Audrey's heart beat faster. But behind the hotel's luxurious façade lies a lot of strange things. Every night something fantastic happens in the ballroom, but you can only get there by invitation, and it seems that Audrey is the only one of all the guests who does not receive one. So she spends time on the roof, along with the hotel staff, listening to gossip about the hotel's dark past. The more Audrey learns about new acquaintances, the more her curiosity grows. She is torn in different directions - pulled back by the past, where an unbearable loss remains, the future promises at least a little joy, and in between - life in a place that hides more than it seems... Welcome to Ruby!