Mystery of the Express Delivery

I am a delivery man, responsible for delivering a package to Plum Villa every day. But trouble has come knocking, and it all has to do with the disappearance of those delivery men five years ago. By a twist of fate, I have entered a mystery... If you, my readers, find 'Mystery of the Express Delivery' interesting, please don't forget to recommend it to your friends in your QQ groups and Weibo!