Legend has it that the Wen-Hua University is located at the junction of Yin and Yang. Initially, the architect designed the building named “Great Tolerance Hall” in the form of a "reversed bagua" to suppress evil spirits. This was intended for trapping isolated ghosts, so that they could not harm humans. Vivid ghost tales around the campus spread out one after another. Some people accidentally enter the underworld in taking an elevator, some accidentally see a female ghost dancing in the classroom, and many students hear faint voice of singing at night...

Lien Yu-Ting (played by Wang Yu-Xuan) is a student of the university. Since her brother fell into a coma after an accident on campus three years ago, she has been wanting to complete the AR game that her brother spent his whole life designing. However, when she and her classmates are at the final stage of practical testing, weird and strange supernatural events begin to happen to them. Yu-Ting also accidentally discovers the reason behind the unconscious state of her brother...