Cheng Nian Yi followed Li Si Ze to visit Li Si Ze's hometown of Yin and Yang Town. The two encountered ghosts and heresies in Yin and Yang Town, and behind each bizarre incident was actually the elusive and treacherous human heart. When the truth was revealed layer by layer, Cheng Nian Yi and Li Si Ze discovered that Yin Yang Town shrouded in rumours and heresies of ghosts and gods, hid a greater secret. After many obstacles, the two teamed up to catch the murderer and demolish the Ghost Mother Temple. Thus life in Yin Yang Town's peace and quiet were restored.