The story takes place in a sanatorium in a quiet mountain area. Young psychologists Meng Nan (played by Liu Chang) and Mu Sifan (played by Lu Shan) came to this strange and secluded place as interns, and began a series of intriguing and bizarre stories. The mentally ill patients in the sanatorium are all kinds of strange, each imprisoned in their own complicated spiritual world waiting for redemption. And those doctors and nurses in white coats also have ghosts and hidden secrets. This is not a simple sanatorium, it is full of mysterious things, and the gods, demons and monsters in the heart are ready to move at the boundary of common sense and truth. And whether Meng Nan, who possesses supernatural power, can eventually achieve his mysterious purpose or fall into a terrible trap, we cannot predict. The thick barriers of the spiritual world have cracked.