According to legend, Wenhua University is located at the junction of yin and yang. The designer designed the building into a "reverse Bagua" formation for suppressing evil spirits, named "Da Ninja Hall", hoping to use this formation to trap lonely ghosts to prevent them from hurting people. Campus ghost stories have been reported one after another and are vivid: not only did people take the elevator but accidentally entered the underworld, but also some people ran into female ghosts dancing in the classroom, and many students heard faint singing at night... Lian Yuting (played by Wang Yuxuan), who is studying at Wenhua University, has been wanting to complete the AR game designed by her brother with his life's work since her brother fell into a coma after an accident on campus three years ago. However, when she and her classmates entered the final testing stage, bizarre and strange supernatural events began to happen to everyone, and Yuting also accidentally discovered the reason for her brother's coma...