Chunyu, a college student who has been estranged from his father since childhood, was involved in a game called "19th Floor" that he couldn't escape. In the game, Chunyu met the smart and calm Gao Xuan, the powerful Doudou, and the funny Yang Bawan and others. She and her friends experienced levels such as a "ghost building" full of shadow puppets and a deserted village pursued by leather figurines. Her friends failed to pass levels at different game stages and fell into a coma in reality.