On a rainy night, Chen Wan, a takeaway worker, received a "last order" with three times the delivery fee. The delivery address was an abandoned cold storage - where she found the body of the platform webmaster, with an unclaimed takeout on hand. Since then, the same "midnight order" has appeared at every murder scene. The order account belongs to a rider who died in prison two years ago. A delivery boy, an online ride-hailing driver, a criminal police captain, a group of ordinary people are involved in a serial murder case: if they don't investigate further, they will be the next to receive the bill. When an old case that had been suppressed five years ago surfaced, they were fighting not only the murderer, but also what was hiding behind the system.
