Yin Yang Eyes: Who Is the Murderer?

I was born with yin and yang eyes and can see the activities of ghosts and gods. In this world, what I value as a police officer is evidence. My ex-girlfriend died in the river with someone else's bag tied to her body. Who was the deceased? Just as I was immersed in the mystery, I suddenly received a strange letter from someone who was once suspected to be dead. A scary phone call late at night, the miserable scream of a woman on the other end of the phone? Everything is so complicated and confusing... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.