Song Yang was born with yin-yang eyes. After learning a few second-rate tricks from his master, he was sent down the mountain to catch ghosts. But his first job went badly: someone ruined the deal right after he got it.
Song Yang: "There's a demon here."
Yin Xun: "Have you forgotten materialism?"
Song Yang: "There's a vengeful ghost here."
Yin Xun: "Have you never studied science?"
The two get caught up in paranormal incidents together:
Yin Xun pulls out a book on Marxist philosophy. "Come on, let's review this together."
Later, Yin Xun's identity is revealed:
Song Yang pulls out a book on Marxist philosophy. "W-we have to uphold materialism. We have to believe in science."
Yin Xun: "Damn, that burns!"
