At eleven o'clock in the night, Lin Mo, an ordinary courier, received an urgent delivery to the old city. The receiving address was a pawn shop that had closed down long ago, and there was no information about the sender. He planned to stuff the package into the crack of the door, but found that the door was ajar. There was nothing in the package, only a piece of yellowed letter paper with red letters saying: "You have been selected. From now on, you can see the 'countdown'." Lin Mo initially thought it was someone's prank, until he passed by a couple arguing on the street and saw with his own eyes the bright red number hanging above the man's head, jumping from "00:00:15" to "00:00:00." The next second, the man was hit by a potted plant that unexpectedly fell from upstairs and fell to the ground on the spot. This is not a game, this is not an illusion. He became a "postman" who could see the countdown of other people's lives 24 hours before death. The first person whose countdown reached zero was the flower shop owner whom he had a crush on for three years.
