Zhao Lei is a courier who is about to be fired because he delivers too many "difficult items". Until he received a courier with the address "No. 7, Row 3, Xishan Cemetery" and the recipient was written "The Lord of Hell". I thought it was a prank, but I didn't expect that a dark shadow actually appeared on the grave to sign for the receipt and gave him a black token: "Next time I deliver something, go directly to the underworld passage." From then on, Zhao Lei started his career as a Yin-Yang courier: he sent elixirs to the old Taoist on the top of the mountain and got the "Yin-Yang Courier Manual"; He exchanged the yin energy given by the underworld for yang life and cured his paralyzed father; he taught his troublesome supervisor at the express station, but he was suddenly haunted by ghosts; when the Blood Demon Palace robbed his express delivery, the Lord of Hell sent Black and White Wuchang to help! "What? Taishang Laojun wants to send a courier to Huaguoshan? No problem, I'll drive the underworld courier there right now!"
