This is a horror novel's plot. You can refer to the following plot: In a luxurious hotel called " Hotel Escher ", there was a room called " Room 1 ". There were four Arabic numbers in the room, from 1 to 4, and each number was related to an animal. According to the plot, some terrible incidents had happened in this hotel, and Room 1 was thought to be one of those incidents. When a traveler checked in, he began to hear some strange sounds, which seemed to come from the walls. His body began to change, and he felt that his surroundings had become very dark and eerie. He also saw some strange things like ghosts and monsters. In the end, he fell into a state of madness and began to hallucinate that there were more people and animals around him. When he tried to escape from the room, he found that the door was locked. He tried to open the door but found that the doorknob had failed. He could only helplessly be trapped in this room until the hotel staff found him. The horror of this story was that Room 1 seemed to be part of a mysterious force that controlled the entire hotel. The existence of this room seemed to imply that something terrible was about to happen, and the experience of the passengers also proved this point.