Amid a torrential downpour, delivery driver Chen Mo witnesses an organ-trafficking deal. While fleeing, he saves an undercover police officer who is on the verge of death and obtains a bronze USB drive containing the history of the Triads. It holds the truth about a dockside riot twenty years ago that his father took part in. He uses a delivery drone for the first time to disrupt the gang’s pursuit, then turns the tables in the maze of pipelines beneath the urban village.
