A mysterious express delivery at two o'clock in the morning, the sender was blank and the delivery person was speechless. When Lin Xia found an old photo from 20 years ago in a cardboard box, in which a "mouthless man" exactly like the delivery man was standing behind her childhood self, she realized that this was not a prank - but a strange cycle of "delivery" that started in the old building. Next midnight, it's her turn to be the sender, but who is the recipient? If you don't give it away, what will it become?
