` Cracking another country`s cipher is an undercover fight to the death...` Hidden deep in the mountains, the recruits at ` Unit 701`, China`s secret services, operate in a dark, shadowy world. There is the `wind-listener`, a blind surveillance officer who can hear sounds from miles away; the beautiful, unstable maths genius who meets a violent end; the old man who deciphers codes in his dreams; the spy who recounts a dangerous mission from beyond the grave. In this story of conspiracies, geniuses, revolutionaries & terrible moral choices, people sacrifice everything for a world of secrets
- until, ultimately, it destroys them.