The Juefeng Pass sound transmission array was interfered by the enemy, and three outposts ten miles away lost contact one after another. Cheng Zhi, a twenty-six-year-old frontier army scout who tames paper cranes, can only use oil-paper cranes with few words on them, which are prone to stalling in the rain and can be intercepted on fixed routes. He started from a returning crane between three sentinels, and connected the wind direction, landmarks, footsteps, wind whistle insects and the judgments of scouts from various places into a multi-channel military intelligence chain. However, Asuo, the leader of the enemy rangers, constantly forged landmarks, intercepted text messages, secretly learned tricks, and even used military regulations and real requests for help to set up traps; Cheng Zhi's own desire for control also made him make cross-border choices under pressure. In order for the paralysis of sound transmission to no longer mean blindness across the board, he must learn to leave judgment to his apprentices, fellow travelers and defenders in various places. In the reality that it will be lost, slowed down and interrupted, there will always be a next way for truly important military information.
