The story takes place in Room 10 of the Sunshine Hotel, a magical room where things that happened have long been out of the scope of scientific explanation. In this room, every item is given a special ability. If you own an item, you can use its ability at will. When the news spread like wildfire, people from all walks of life gathered in Room 10 from all over the world with various purposes. However, what they don’t know is that you have to pay to get it, which may be physical, emotional, or even life. By chance, policeman Miller (Peter Krause) got a mysterious key, and this key belonged to Room 10. At the same time, Miller’s daughter also disappeared in the room for no reason. In order to find his beloved daughter, Miller embarked on a journey full of danger and disaster.