On the brink of death, courier Lin Kuai suddenly sees everyone’s “life countdown.” To extend his remaining three days, he is forced to sign a bizarre employment contract and become a temporary worker for the Underworld’s Yin-Yang Express. His job is to travel between modern cities and ancient tombs, delivering special “parcels of lingering obsession” to the spirits of famous historical figures stranded in the mortal world: deliver a takeout order to Qin Shi Huang, find the lost sword of a general who fell in battle, and pass on the unsent love letter of Yang Guifei to her reincarnation.
