According to martial arts legend, after the Battle of Bishan, Lin Moxi, the leader of the Immortal Sword Sect, was used as a forbidden concubine by Third Young Master Feng. The Immortal Sword Sect sent many people to rescue him, but to no avail. But when Xiao Xu, a young disciple of the Immortal Sword Sect, accidentally entered the Ningbi Palace, everything became even more complicated and confusing.