Acting Impermanently

I became Bai Wuchang, holding a mourning stick and walking through the yin and yang for hundreds of years. I'm used to seeing souls' joys and sorrows, seducing all the people they deserve. I thought this was eternity. Until one day, everything went dark, and when I opened my eyes again, I saw the streets of a modern city. I smiled and thought the nightmare was over, but when I turned around, I had a mourning stick pressed against my throat. Hei Wuchang stood under the neon lights, his voice hoarse like the night wind: "I searched all over the underworld..." "Can you tell me where my friend Xie Bian is?"