Su Yun, a Taoist priest of metaphysics, went down the mountain to practice, but was accidentally involved in a bizarre murder case. Relying on psychic and occult magic, he summoned the ghosts of wronged persons to prove his innocence, assisted policewoman Li Yan to repeatedly solve unsolved cases, and transformed from a suspect in the administration to a special consultant. During this period, he cracked the soul-suppressing array, tracked down the Yin Gathering Pearl, faced transnational criminal organizations and vicious evil objects, and improved his cultivation with the power of merit. Not only did he gain friendship with Li Yan, but he also became a legend in the industry, guarding peace in the confrontation between good and evil.