On a rainy night, Lin Feng, a delivery boy, was stuffed with a USB flash drive by a stranger, and his peaceful life was torn apart by gunfire. Agents from various countries, mysterious organizations, and underground forces appear one after another, all for this USB flash drive that hides a shocking secret. Lin Feng discovered that not only could he understand the encrypted files in the USB flash drive, but he could also copy the enemy's combat skills in every crisis. He escaped and upgraded all the way, from a delivery rider to an international agent walking on the edge of a knife. Codenamed K, officially launched.
