The male protagonist Shen Yi was out for a stroll during the Ghost Festival. He bumped into two people dressed as cow heads and horse faces. He mistook them for a prank and stepped forward to tease them. When the other party asked, "Can you see us?", He just thought it was a joke. Unexpectedly, he fell asleep that night and stepped into a dimly lit mysterious office. A strange entanglement with the underworld began.
