Midnight Inbox

Lin Mo, an ordinary courier, shuttles through the streets of the city every day. In order to make up for the skyrocketing rent next month, he has to take all kinds of late-night orders that no one wants to run. Until one day, when he sent an old envelope marked "Do not open", he found that the recipient address was an old building that had been demolished long ago. What was even weirder was that the old lady who handed him the envelope turned around and disappeared into the wall. That night, he picked up an old mobile phone with a screen broken into cobwebs. As long as he received a text message at midnight, the person mentioned in the text message would mysteriously disappear before dawn. His childhood friend Su Qing is an enthusiastic community volunteer who is always around him asking for help. However, Lin Mo gradually discovered that Su Qing always had a copper key of the same era as the old mobile phone in her pocket, and the way she looked at him was like looking at someone who should have disappeared but accidentally left behind.