Jian Yuqing received an invitation letter from the "King of the Chamber of Secrets", promising to solve the mystery of her parents' disappearance and lead her to an abandoned mental hospital in the suburbs. Yuqing woke up and found that she was imprisoned in a secret room transformed from a gloomy mental hospital. She met four other participants who had also received invitations, and each of them had unknown secrets. The design of the chamber bears a striking resemblance to her childhood nightmares, hinting at a deeper connection to the place that the game designers seemed to be specifically targeting.