When an orange rainstorm warning and smuggled gold arrive at the same time, courier Lin Xiaobei discovers that his father's sacrifice in fighting the flood twelve years ago actually hides a shocking secret. 24 Hours before the flood submerges the city, he must use the spatial memory trained in express delivery sorting to crack the golden code and use the delivery route map to rewrite the speed of life and death. In this rhapsody of natural and man-made disasters, every barcode is a password, every package is evidence of crime, and the key to counterattack is hidden in the Sentinel Medal that my father guarded with his life.
