When Chen Fan, an ordinary high school student, swung his fist to protect his female classmate, he thought he was just breaking school rules, but he didn't expect to break the barrier between the two worlds. On the rainy night when he was expelled from school, the "spirit detection talisman" handed over by the mysterious Taoist priest allowed him to glimpse the truth hidden under the surface of the city - the inner world, a parallel dimension dominated by six extraordinary systems.
